"Echelon" means "level," class or degree. For example, if someone moves from middle management to upper management, s/he is going from the middle echelon to the upper echelon.

"Forerunner" means something that came first.

"Penchant" means fondness for an activity.

"Emblem" means banner, symbol or badge.

"Invasion" means an attack or an encroachment.

The noun "mutation" refers to an alteration, a change. To "mutate" is to change form or being. Additionally, a "festival" is a celebration, a gathering, a formal party; a "facade" is a false appearance put on for show; a "contract" is a formal agreement between two or more parties; an "asset" is property, something that can be owned and has value.

The noun "correlation" is used to describe a connection, a shared relationship between two things. Additionally, "correspondence" is letters sent and received, written communication; a "conundrum" is a problem, a difficult situation; a "commemoration" is a formal event designed to remember and praise the achievements of someone; "commiseration" is the act of sharing in someone else's misfortune or sadness. Based on these vocab words what do you think the prefix co- means?

The noun "diversity" refers to how much variety there is in something, the state of having many different types of something. Additionally, "ethnicity" means race; "location" is where something is; "audacity" is boldness, courage; "circumference" is the length around a circle, the perimeter, the border.

"Compunction" is a feeling of guilt and sadness for something done wrong, guilt, regret. Additionally, "ecstasy" is deep happiness; "sorrow" is great sadness; "dread" is deep fear and anxiety.

The correct answer is "option."

In this case, "alternative" is a noun that means available as another possibility. 

"Option" is a noun that is defined as a thing that is or may be chosen (as a possibility).

"Option" is a synonym (has a similar meaning) of "alternative."

The noun "repercussion" refers to the consequences of something, the outcome of an action, the effects of an action. Additionally, "permission" is consent, approval to do something; "reconnaissance" is a mission designed to get more information, 'recon'; a "protest" is a formal gathering of people to express anger or disapproval about something in the government or society; "resemblance" means likeness, having the appearance of something else.

The noun "epiphany" means a sudden realization, an insight into the nature of something. Additionally, an "aspiration" is a goal, something that one desires to accomplish; "obese" means medically diagnosed as overweight, fat; "eminent" means famous within a certain area, distinguished and notable; a "boon" is something helpful or useful, a gift, a blessing.

The noun "ambiance" refers to the character, atmosphere, climate of an environment. So, somewhere warm and friendly will have a positive and welcoming "ambiance." Additionally, "occupation" and "vocation" are synonyms, both words mean job, what you do for a living; a "fissure" is a crack in something; "fusion" is the process of joining two or more things together.

The noun "decadence" refers to the moral decline of a society due to a loss of moral values. Synonyms include "sin," "vice," and "depravity." Additionally, "virtue" is the antonym of "vice," it means goodness, righteousness. Finally, "sloth" (which means laziness), "greed," and "envy" are examples of the "seven deadly sins."