Question

plant requires less energy than animals give reasons

Answer 1

because the animal move from ane place to another and plant still there on place

Answer 2

because they don't have to locomote for food which animals have to due to lack of chlorophyll. also plants have no other activity except photosynthesis and transpiration during the day and respiration using oxygen at night . the energy liberated in them is also less than that of animals who do much more work.
Hope it helps u