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No, a tent is a temporary, flexible structure, usually built with poles and woven material or hide.
A crayon is a mass struture. It is a mass structure because it does not have a skeleton for a frame is does not hold anything it is, so it isn't a shell so it must be a mass.
Mussels have a sort of exo-skeleton. Their shell.
The Eiffel tower and a bike are some. Frame structures are not necessarily only things made of metal and those kind of materials, but also everyday structures like a bed, a chair or a window. A frame structure is something that is made up of a variety of materials that consists of a frame and is filled in from that.
A cheetah has an endoskeleton, which is an internal skeleton.
The boney kind.
internal
This is called an exoskeleton.
shell because it is hollow and therefore represents the form of a shell which is also recognized as a shell structure
It has an exoskeleton.
anthipod
a spine?