Which is the best example of commensalism? a. honey bees feed on the pollen of cornflowers and the flowers reproduce. b. barnacles ride on a gray whale’s back to obtain food, and the whale is not harmed. c. squirrels and chipmunks eat the same nuts in a forest where food is scarce. d. prairie dogs often collect and eat food in groups so they are better protected from enemies.

I don't know if it's a or b

so,I think A is wrong because it's an example of mutalism. so i think the answer is B.

Explanation:

the volume increases

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.