Answer: The correct answers are -
1) A. fish
2) A.Plant cells have cell walls containing cellulose, and animal cells lack a cell wall.
Vertebrates are the backbone or spinal cord bearing animals.
There are five classes of vertebrates that are fishes, amphibians, reptiles, birds, and mammals.
Plants and animals are the two different kingdoms of eukaryotes. Plants have cell wall (which is made up of cellulose) around their plasma membrane (cell membrane) whereas animals lack cell wall.
Thus, option A) Fish in the first question is the right answer and option A) in the second part best describes a characteristic that distinguishes animals from plants.