'As for animals 'caring' about their young, this is another example of evolution. For it can be shown that a creature that has evolved naturally is only exactly as good as it has to be in order to survive; - there are no super animals. For example, as foxes and rabbits no doubt evolved alongside each other, a trait, such as reproducing often, became attributed to the rabbit, and predatory habits became more evident in the fox, and the two balanced each other out. In this way, it is unlikely that an animal could ever 'take over' the planet, i.e. become a giant, armour-plated, razor-toothed, eight-eyed, winged, poisonous blood-sucking chameleon that lives for a thousand years. That would almost certainly never evolve because if it did it would quickly consume all edible prey until it either died out or less extreme variations of itself took its place. To be balanced, some animals have many young, and a large proportion of them snuff it (e.g. turtles) and some protect the few that they do have (e.g. humans) by instinct. The variations of a species without the maternal instinct disappear quickly because their babies (who have the non-caring gene) don't survive without their parents' protection.
There are few questions on the subject of evolution that can't be explained.
[OK, so it was three.]