The first two these are due in 3 hours

#1 )
The difference between internal and external fertilization is the option that states internal fertilization occurs inside the female’s body, while external fertilization occurs outside the female’s body. 

#2 )
The option that is a disadvantage of external fertilization is the option that states gametes may get washed away. 

#3 )
The option that is an advantage of internal fertilization is the option that states the developing zygote is protected.

This would be canberra.