Why did early farmers use slash-and-burn agriculture? a. to get rid of pests b. to get rid of old crops c. to keep the soil fertile d. to keep undergrowth from drying out the earth

C. To keep the soil fertile

the ashes somehow replenishes the soil thus providing nutrients for future crops. If they didn't do this, the soil would be depleted. They also rotated crops so that they didn't deplete the soil. 

Hopefully this helps.

the most important factor in the

work process or industry is to retain the interest of the employee. and to

retain them, their salary or profit must be adjusted to the best value. unless

the employee does not do his job properly, employees must receive bonuses or

benefits to ensure them to stay in the company. it will actually make them stay

longer, make them feel important and reduce costs for hiring new employees.

explanation:

mark brainliest!