D. egg cell and sperm
basically gametes make babies and those are the two things you need to create one.
The first answer is the correct one
A way for animals to avoid competition.
Hope this helps ☺
What is the rest of the question
Answer:
A cladogram is a diagram used to represent a hypothetical relationship between groups of animals, called a phylogeny. A cladogram is used by a scientist studying phylogenetic systematics to visualize the groups of organisms being compared, how they are related, and their most common ancestors.