Do Cartilaginous fish have 4 limbs

Yes

Explanation:

They have a complete backbone; they have jaws; their endoskeleton is made of cartilage; they are ectothermic. ... They have a bony endoskeleton with a backbone and jaws; they breathe only with lungs; they have four limbs; their skin is covered with scales; they have amniotic eggs; they are ectothermic.

i think it's they require warm air

explanation:

tornados usually happen when it's raining right so when it's raining it cools down so if the temperature keeps changing then i think a tornado occurs sorry if it's wrong

i think the answer would be d