No muscle works independently, with this in mind discuss the roles of agonists, antagonists synergists, and fixators in movement.

Answer and Explanation:

There are four major roles of muscles that provide the movement that are given bellow.

AGONIST : They are also known as prime movers it provides force to complete the movement.

example : flexion of elbow

ANTAGONIST : They oppose the movement which was produced by agonist

example : extension of elbow by triceps

NOTE  : They also slows down the movements

SYNERGISTS : Their main role is to stabilize the joint in which moment take place they also help in performing the movement to agonist.

FIXATORS : Their main role is to stabilize the origin of agonists and stabilize the joint

example : Rotator cuff muscles

answer:

i don't believe the ocean is purple, but it might once have been:

as for the sky, according to nasa:

"sunlight reaches earth's atmosphere and is scattered in all directions by all the gases and particles in the air. blue light is scattered more than the other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time."