Atoms of which pair of elements will form covalent bonds in a compound? Na and Al
Ag and Ca
I and F
Be and Cl

human-caused climate hope this

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

a. by using fur or clothes to trap heat energy near the body

age range would be the answer