Which scenario would result in a positive population growth? Use this formula:
population growth = (birth rate + immigration) – (death rate + emigration)

30 individuals emigrate, 30 individuals die, 30 individuals are born, 0 individuals immigrate
22 individuals emigrate, 10 individuals are born, 12 individuals immigrate, 0 individuals die
15 individuals immigrate, 9 individuals emigrate, 6 individuals are born, 0 individuals die
18 individuals immigrate, 20 individuals die, 1 individual is born, 0 individuals emigrate

The correct answer is - option C.

Explanation:

Using Formula:

Population growth = (birth rate + immigration) – (death rate + emigration)

A) Birth rate = 30

Immigration = 0

Death rate = 30

Emigration = 30

Population growth = (30 +0) – (30 +30)= -60

B) Birth rate = 10

Immigration = 12

Death rate = 0

Emigration = 22

Population growth = (10 + 12) – (0 + 22)=0

C) Birth rate = 6

Immigration = 15

Death rate = 0

Emigration = 9

Population growth = (6 + 15) – (0 + 9)= 12

D) Birth rate = 1

Immigration = 18

Death rate = 20

Emigration = 0

Population growth = (1 + 18) – (20 + 0)= - 1

Scenario (c) would result in positive population growth as other scenarios result in negative or no change.

compost can be added to topsoil as a:

pesticide