contamination to an animals food can harm other animals because whoever is eating the food is probably going to be eatin by another animal or it takes care of its young or its family so whan ever another animal eats the animal that ate the contaminated food the other animal gets sick. or whenever an animal is taking care for its family it could transmit its desis to one another.

the Jurassic Period saw the dinosaurs become the dominant land animals on Earth. During this time, bony fish dominated the seas, and the first mammal evolved. Herbivorous dinosaurs put more pressure on the dominant land plant, gymnosperms, pushing them to new strategies to survive this predator.

Natural selection is the process by which species adapt to their environment. Natural selection leads to evolutionary change when individuals with certain characteristics have a greater survival or reproductive rate than other individuals in a population and pass on these inheritable genetic characteristics to their offspring.