Explanation:
For solid it could be melting into a liquid
for gas it could be Evaporating into a liquid
Im pretty sure that it is (A) because blood pumps to get every where through your body. If it didn't one half of your body would feel cold or numb.
D) Yes, the need to conserve copper must be balanced with use.
<span>The word from the pick list that fits here is "enzyme". Enzymes are normally spcialised protein molecules and they act as catalyst ie agents to speed up a reaction in causing traits to develop in the genes of organisms in reaction to chemical stimulants.</span>
The tongue has been considered as the strongest muscle yet it is a group of muscles. This is because it does not stop working. It is use if someone is eating, drinking, pushing the food as well as the liquid down to the throat and works to keep saliva out of one's mouth.