Which factors improve soil fertility? select the three correct answers.
a. artificial fertilizer
b. high ph
c. water
d. bedrock
e. nitrogen-fixing bacteria

A. Artificial fertilizer, C. Water , E.Nitrogen-fixing bacteria

Explanation:

The ability of soil to provide nourishment to plant for proper growth is known as soil fertility.

Soil fertility can be improved by adding Artificial fertilizers, water and nitrogen-fixing bacteria.

The artificial fertilizers adds nutrients which are missing in the soil. These nourishes the soil and good for the growth of the plant. The adequate amount of water is important for growth of the plants. Excess or lack of water could be  harmful for condition of soil. Nitrogen fixing bacteria are present which fixes atmospheric nitrogen. This improves the fertility of the soil.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me