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.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.