What is the main difference between free weights and a universal machine?

(1 point)
Responses

Universal machines build bigger muscles because they allow for more repetitions.
Universal machines build bigger muscles because they allow for more repetitions.

Universal machines are safer because the weights are not above the body.
Universal machines are safer because the weights are not above the body.

Universal machines are for advanced weight lifters only.
Universal machines are for advanced weight lifters only.

There is no difference.
There is no difference.

Universal machines are for advanced weight lifters only.