endothermic (warm-blooded) slimy skin ectothermic (cold-blooded) hairy skin
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which characteristic is common to all reptile species?
Possibilities:
- endothermic (warm-blooded)
- slimy skin
- ectothermic (cold-blooded)
- hairy skin

ectothermic (cold-blooded)