"Doting" means indulgent, affectionate or loving.

"Content" means happy or satisfied.

"Envious" means having envy, or desiring a trait possessed by someone else.

"Adorable" means sweet and cute or lovable.

"Hateful" means nasty, cruel or despicable.

"Perfume" and "cologne" are synonyms of one another, both words mean something sprayed onto one's body to make one smell nicer. Although colloquially "perfume" is used for women and "cologne" for men. So, to solve this analogy you need to determine which of these is a synonym of "bog." Well, a "bog" is wet, muddy ground that is difficult to traverse. This is very similar in meaning to "swamp." Additionally, a "rivulet" is a small river, a tributary or offshoot of a river; an "islet" is a small island; an "estuary" is the mouth of a river, where the river meets the ocean; "peak" means summit, the top of a mountain.

"Felicity" is a noun used to describe happiness and contentment or something that creates happiness and contentment. For clarification, "despondency" is a feeling of hopelessness.

A group of wolves is called a pack. Similarly, a group of geese is called a gaggle.

None of the other analogies have this specific relationship.

Groups of children are not called a school, although groups of children do go to school.

Wolf and dog are related, but the analogy does not fit the relationship of single animal to group of that animal.

Groups of pigs do live on farms, but the order of the words is incorrect: a group of farms is not called a pig.

A group of reptiles is not called a herd; a herd typically refers to a group of hoofed animals.

A group of wolves is called a pack. Similarly, a group of geese is called a gaggle.

None of the other analogies have this specific relationship.

Groups of children are not called a school, although groups of children do go to school.

Wolf and dog are related, but the analogy does not fit the relationship of single animal to group of that animal.

Groups of pigs do live on farms, but the order of the words is incorrect: a group of farms is not called a pig.

A group of reptiles is not called a herd; a herd typically refers to a group of hoofed animals.

The purpose of a "furnace" is to provide "heat." So, to solve this analogy you need to determine what the purpose of a "generator" is. Well, a "generator" generates "electricity," so this is the correct answer.

"Fruitless" means not achieving the desire result, unsuccessful. It is an antonym of "successful," so to solve this analogy you need to determine which of these is an antonym of "forgiving." The correct answer is "vindictive," which means having a strong desire to enact cruel revenge. Additionally, "opulent" means luxurious, lavish, grand, magnificent; "reckless" means acting rashly, doing something without considering the consequences; "flippant" means acting disrespectful; "tenacious" means determined, hard-working.

If something is “undulating,” it is wavy. If someone is “fatigued,” they are tired. To clarify, “starved” means very hungry.

A xylophone is an example of an instrument, so we need to pick out an answer choice that consists of two nouns, where the first is an example of the second. While “pear is to fruit” and “game is to chess” might each look like a potentially correct answer, “game” is not an example of a “chess,” so “game is to chess” cannot be the correct answer. A pear is an example of a fruit, however, just as a xylophone is an example of an instrument, so “pear is to fruit” is the correct answer.

The correct answer is "paintbrush is to artist."

This analogy explores the relationship of a tool and the user of the tool. Clippers are used by a barber to perform the task of cutting hair; likewise, a paintbrush is used by an artist to paint.