Which of theese is not basic need of all organisms a. food b. air c. water d. soil

Soil is not a Basic need of all the organisms.

I believe it's answer D. We humans are organisms and we do not need soil to survive. It's the easiest way to figure out the answer.

if you mean

then it's c. 8, -7/3

but if you mean

then it is

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.