Ascientist noticed that the number of salamanders in ponds in the rocky mountains was declining. this was a(n)
a. hypothesis.
c. observation.
b. theory.
d. control.

Jasmine, at 33 months of age, is able to engage in some self-care behaviors but still has trouble with tasks such as putting on socks. a few months later, she accomplishes this same task relatively easily. the change in abilities is most likely due to