Humildepo698id
Answered

Plowing across the slopes of hills to prevent topsoil erosion in known as
a. fertilizing
b. strip mining
c. crop rotation
d. contour farming

Sagot :

Ateeyeshaid
it is a farming that forming ridges along them that prevent topsoil erosion that plowing across the hills is what known as contour farming... so It's letter D, contour farming..