Which type of regulation is best for the following environmental changes?
a. Caterpillars (with short life expectancies, ~ 2months) born in the spring compared to the fall have different morphological features to better camouflage in the environment.
b. Delayed germination of a seed until the conditions are sufficient.
c. A fish in a lake moves from shallower to deeper water throughout the day to maintain internal temperatures.
d. A dog sheds their winter fur coat in the spring.