Which of the following is an example of a fixed action pattern behavior?

a cat using a litter box

a monkey washing a piece of food

a dog rolling over at the sight of a treat

a robin flying south for the winter

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.