What do these two changes have in common? saliva breaking down a piece of bread

a penny tarnishing

Select all that apply.

both are caused by heating
both are chemical changes
both conserve mass
both are changes of state

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except