"Desolate" means "deserted" or lacking in people or inhabitants. "Ambitious" means determined to succeed in the future. "Passive" means submissive or not engaged in what is happening. "Belligerent" means aggressive or warlike. "Rash" means reckless or not careful.

Sustained means continuous or ongoing.

"Incipient" means beginning to exist or appear. So, "beginning" is the correct answer because it is closest in meaning to "incipient."

“Vast” means very big or enormous. For clarification, miniscule means very small and is an antonym of “vast”; aloof means distant or shy; accountable means responsible, able to be held responsible for something.

"Replete" means full or complete.

"Erratic" means not following a pattern, or unpredictable.

"Eternal" means lasting forever, or endless.

"Celestial" means relating to the sky, or heavenly.

"Juvenile" means young.

Initial means beginning, first, or commencing.