Which behavior is an instinct? A. An elk gets used to hikers and stops running away.
B. A pet dog sits and waits for a treat after its daily walk.
C. A pigeon visits a local park to look for dropped crumbs.
D. A robin builds a nest using mud, grass, and small twigs.

D

Explanation:

A robin building a nest is not learned or taught like the others. It is just instinctive for robins to build nests.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

c.           is the correct answer