The answer would have to be D
Transverse waves contain crests & troughs
while longitudinal waves contains compressions &rarefactions.
The correct answer is: marsupials.
Marsupials are actually defined by their ability to hold the young in the pouches, where they can be well protected. Some examples are Kangaroos and Koalas.
Other answers are wrong: for example, gymnosperms are plants, not animals.
I believe it is earth and Mars, if I’m wrong I’m very sorry
