Animals have to adapt to the food that live there plus if there is a body of water fish and organisms that live in that water have to adapt to the type of fish in that water.
Some stimuli act as attention-getting stimuli due to their physical characteristics; others, due to their meaningfulness, act as attention-holding stimuli.
For example, somebody's physical appearance, of a person who is attractive, is used as an attention-getting stimuli, but their psychological qualities are what hold your attention due to their meaningfulness.
The answer to the question above is a cell.
D identity disorder is characterized by the presence of two or more distinct personality identities. Each may have a unique name, personal history, and characteristics.
Pretty sure the answer is B as erosion happens from weather or rain