African elephants flap their large ears to cool off. which biology theme does this phenomenon represent?
a. continuity and change
b. relationship of structure to function
c. interdependence in nature

African elephants flap their large ears to cool off represents B. Relationship of structure to function 

The African elephants flap their ears in the air to cool off the blood that flows through them. It's working like a fan. The elephant is adapting to the environment's temperature.

He should put sand around the spill in order to contain it so that it won't spread

Centriole.centrioles are present in animal cells but are usually absent in plant cells.