An exoskeleton is the outer skeleton of an animal to protect them. An exoskelton is also called a shell.
Qué significa tener energía? Bueno, piensa en cómo te sientes cuando despiertas por la mañana.
The answer is A) An inner skeleton made of bone or cartilage. Vertebrates have a column of bones that supports the body and protects the spinal cord, while invertebrates are animals that either have a soft body or a hard outer casing covering their body.
the answer here should be B
