what is the difference between the -s at the tropics and the -s at the end of needs

Answer 1

"Tropics" can be either singular or plural. The word refers to a specific part of the world.

"Needs" is a plural form of "need."

Look these words up here:

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Answer 2

Since "tropics" is a noun, the -s makes it plural.

The word "needs" can be both a noun and a verb. As a verb, the -s shows that it is singular.

Examples:

He needs a cup of coffee.
They all need coffee.

Answer 3

thanks

Answer 4

Thx 😊