pls help :/ Would be possible to design a large, complicated, high-quality object—like a car—that could be made completely by 3D printing?

Yes, it would be very time consuming and expensive though. Look up the biggest item printed. We can go beyond that if we make 3d printer big enough.

Explanation:

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.