1.

1). Amicable 2). Affluent 3). Alacrity 4). Sustainable

Answer»

The only option to fit here is sustainable as it means able to be maintained or kept-up overtime. Thus option 4 is the correct answer.

Alias?=>?used to indicate that a named person is ALSO known or more FAMILIAR under another specified name

Alacrity =>brisk and CHEERFUL readiness.

Affluent ?=>?having a great deal of money; wealthy.

Amicable?=>?characterized by friendliness and absence of DISCORD.



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