I think it’s A
I think so because the Synovial membrane acts as a lubricator, much like how oil lubricated the joints of the tin man. If the lubricants were removed, the friction would increase as there is no oil to decrease the friction and let the bones function properly
Blind spot because they are unaware of where you are so they could hurt you
Every organism (well, animal) only has one binomial name
If I’m reading correctly the answer is C