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.

y = (1/2)x + 5/2

Step-by-step explanation:

y - 3 = (1/2)(x - 1) is in point-slope form.  To obtain the slope-intercept equivalent, solve this equation for y:

y = 3 + (1/2)x - 1/2, or

y = (1/2)x + 3 - 1/2, or

y = (1/2)x + 5/2