Question Detail
Question
All animals are _______.
Correct Answer
Option C is the correct answer.
Detailed Explanation
A defining characteristic of all animals (Kingdom Animalia) is that they are multicellular. Not all animals are warm-blooded (endothermic) or cold-blooded (ectothermic), and only vertebrates possess vertebral columns. Invertebrates, which make up the vast majority of animal species, lack vertebral columns.
Hint
This is a very broad and fundamental characteristic that applies to every member of the animal kingdom.