The following animals mainly breathe by body surface are () A. Shrimp B. Grasshopper C. Frog D. Mushroom.

Shrimp and locust have segmented bodies, appendages and exoskeletons, belonging to arthropods, and their respiratory organs are trachea. Frogs are amphibians. Larvae live in water and breathe through gills. Adult amphibious, breathing with lungs, skin-assisted breathing. Worms have symmetrical sides, a mouth and no anus. It belongs to a flat animal and mainly breathes on its body surface.

Therefore, choose: d.