Abear has an that is inside its body. its skeleton is made of bone and cartilage, not of like a grasshopper's. when the bear moves its forepaw toward it using its bicep, the bicep is called the \

what words fill these spaces correctly, in order?

endoskeleton, chitin, prime mover

endoskeleton, chitin, agonist

exoskeleton, chitin, prime mover

inskeleton, chitin, origin

From what I can tell, The answer is either A or B. Mammals have what is called an Endoskeleton, which means that their skeletons are inside their bodies. A way to remember this is Exo- is similar to exit and when you exit something then you are going outside. Endo- sounds like into, which can relate to being on the inside. Insects have Exoskeletons, which are made from Chitin. Now Agonists are also called Prime Mover muscles, which means they are practically the same thing.