It eats both meat and vegetables/leaves/fruit.
by its jaw
Whether they are a carnivore, omnivore, or herbivore, and also what types of food they consumed, i.e for a herbivore, what types of plants they could eat.
by looking at it
It depends on the animal. Some are more difficult than others to tell by looking. If you can tell us which animal we can be more helpful.
i dont no you tell me
The food remnants in the coprolite would tell whether the animal was a carnivore, herbivore, or omnivore. A carnivore's dung would not contain plant matter and would likely have bone fragments. An herbivore's dung would probably have some amount of undigested plant fibers left in it. An omnivore's would probably have a combination of plant and animal remnants, unless it had only eaten one of those recently.
The definition of an omnivore is an organism that consumes both plants and animals so that's how you can tell that an organism is an omnivore.
If you are asking what feeds off other plants and animals, then I will tell you that an omnivore is something that feeds off plants and animals. A carnivore is something that only eats other animals. A herbivore is something that eats only plants.
One way to tell them is by looking it up and don't be so lame. Using a microscope might be useful.
it can tell by studying its teeth
No, skin has no relation to habiits.
Short. No time, no seasons, no crops, no food, no animal cycles.