Which sentence is correctly written?

a. Gophers are small rodents that dig holes in the ground and destroy gardens by eating the underground parts of plants.

b. Gophers are small rodents that dig holes around the ground and destroy gardens eating parts of plants underground.

c. Gophers are small rodents that have destroyed gardens with digging holes and eating plants inside the ground.

d. Gophers are small rodents that dig holes for plants and destroy gardens underground by which they live.