What does this phrase mean: "to fall in love"?

[chidu]

Test No. incompl/inter-84 "Simple Present (1)", question 5

It was in the spring when leaves appear on trees and nature prepares herself for renewal. Other things happen too - people ......... in love.

(a) tumble
(b) drop
(c) decline
(d) fall

Test No. incompl/inter-84 "Simple Present (1)", answer 5

It was in the spring when leaves appear on trees and nature prepares herself for renewal. Other things happen too - people fall in love.

Correct answer: (d) fall
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is it correct

[Alan]

Fall is the right answer.
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English as a Second Language
You can read my ESL story Present Simple

[Guest]

[Rich7]

It's not femenine but neutral, take a look at this:

(pron.) The neuter reciprocal pronoun of It; as, the thing is good in itself; it stands by itself.

[Torsten]

In some cases nouns are referred to by the personal pronoun her. For example, when we talk about nature, the earth (which often is also referred to as mother earth), ships and abstract nouns such as love.

TOEIC listening, photographs: Hiking in the mountains