Q: Fact 1: Many plants respond to the days growing shorter in the fall by going dormant. Fact 2: Trees are dormant from November to March. Given the two facts above, when do many trees respond to the days growing shorter?

OPT:
(i) air cools.
(ii) Winter.
(iii) wind.
(iv) in fall.
(v) in summer.
(vi) autumn.
(vii) late winter.
(viii) in spring.
The answer is:
(iv)