What is the difference between development of fertilized eggs inside mammals compared to other animals ?
A. It can spread the species around the ocean, sponge can grow without competing for resources.
B. Make more of their species
C. In mammals, the animal develops inside the female. In other animals, the animal develops outside the female (egg) but is fertilized inside the female.
D. They don't have as many cells as complex organisms and they have simpler organ systems than complex organisms.
pls answer this serously thx