variable shapes and variable volumes
they use the waves that are formed to see and learn about the different layers there are in Earth's crust
Thermal energy/ heat energy
I think the answer would be 420hg=4,200,000cg
The coral provides the algae with a protected safe environment (a home) and compounds they need for photosynthesis. The algae in return, produce oxygen and help the coral to remove wastes. Most importantly, zooxanthellae supply the coral with glucose, glycerol, and amino acids, which are the products of photosynthesis.
