internal
its internal
External
There are many internal and external factors that affect child development. One internal factor is the genetic makeup of the child.
development of an economy is an internal phenomenon as it comes from within.
lll
internal. They develop inside the womb
External, because they lay eggs.
Cheetahs are placental mammals, so they have internal fertilization and internal development within the uterus of the female.
Mammals have internal gestation with viviparous birth.
I am struggling with that answer my self.
Reptiles and birds are among the major groups of vertebrates that have internal fertilization and external development. Also included are monotremes and marsupials.
I remember a really great explanation in an old biology textbook, but I no longer have it and I'm having trouble finding a good answer for you online. One big advantage is that because the offspring are carried inside the mother and not in eggs, they are mobile and the mother can protect them from predators.