The energy that's required to break bonds is called bond energy. Bond energy is used in chemistry, represented by an E, and accounts for measuring the strength of a bond in a chemical bond.
1-2 days before it needs its light for vitamin D
Fungi: Chitin
Algae( water like protists) : Cellulose
I'm not entirely sure on this one... But I think it's 1. cell division helps animals repair old cells..
like please