Fact 1: Dilation occurs when cell walls relax. Fact 2: Conversely, a decrease in light intensity causes dilation of the pupils. Given the two facts above, what can cause cell walls to relax?
Choose your answer from:
(A). Decreased light intensity.
(B). Something coming from a gland.
(C). matter vibrating.
(D). Temperature changing.
(E). Water vapor cooling.
(F). the Earth being tilted.
(G). raising their temperature.
(H). heat produced.
(A).