What is an example of commensalism? * A tape worm living inside of the intestines of a dog.
A cuscuta plant growing over the branches of a Citrus plant.
An owl nesting inside an oak tree.
-O A humming bird feeding on nectar from a flower.
O A starfish feding on a mollusk.

answer; a muscle cell, another neuron and a of the above

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.

im not intirely sure but i think the anwser is d relative humidity