Rabbit produce about 1-14 baby's during each gestation period, which is an over production of rabbits.
Competition
As you can see, competition is occurring because the baby chicks are fighting over thew food that the mother brought home.
Variation
These huskies are all the same breed but their genotypes are different which causes a different phenotype, so they all look just a little bit different
Adaptation
That rat can blend in to the dessert more rather than his siblings who have a more brownish hue, which gives them a less likely chance to survive unlike him he has a better chance of survival
Natural Selection
Natural selection is when an organism inherits a favorable trait that benefits them.
Natural selection has taken place on these two dogs here. They can blend into the snow during the winter which helps them survive.
Speciation
It is proven that polar bears and bears are closely related but I'm pretty sure that before they might've been the same species but evolved to adapt to their environment based on biogeography