All animals are
a. land-dwelling multicellular heterotrophs.
b. capable of walking on legs.
c. multicellular, heterotrophic and lack cell walls.
d. unicellular or multicellular, heterotrophic and lack cell walls.

Option D, unicellular or multicellular, heterotrophic and lack cell walls.

Explanation:

Animal kingdom comprises of all organism that do not have cell wall which is a peculiar characteristic of plant kingdom. Also, unlike plants which are autotrophs (containing chlorophyll), animals are unable to make food of their own and hence are known as heterotrophs.

Animals can be multi-cellular (having multiple cells) like dog, cat etc and uni-cellular(having one cell only) like slipper animalcule.

Hence, option D is correct.

the man is bald so he has no hair to get wet

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.