Question

When the (wind blow), the cradle will rock.
Options:
1) wind blew
2) wind blews
3) wind blows
4) No improvement

Answer 1

3)wind blows

hope this helps

Answer 2

Option 4 is correct.

This is because the first option is in the past tense while the rest of the sentence is in the future tense.
The second option is grammatically incorrect.
The third option is in the present tense. Since the rest of the sentence is in the future tense, even this is incorrect.