How many kingdoms are represented by the organisms?
a bird
a tree
a lion?

answer: c.

explanation:

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=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves