Imagine a bodybuilder flexing their muscles. which type(s) of tissue go into that action?

The tissues that come into action are cartilaginous, bone, muscular and tendon.

Explanation:

It must also be taken into account that the joints are the queens of contortionist movements, they are the ones that are most in demand, and the ones that most control the movements together with the proprioceptors and the muscular golgi reticulum.

Joints are not mentioned in the answer because they are not a tissue, but a set of tissues.

b would be the right answer

cell regulation is conducted by special proteins.