I need helppp plzzz When throwing a ball, why does the triceps muscle contract?

•The contraction of the triceps muscle causes the arm to flex

•The contraction of the triceps muscle causes the arm to extend

•When added to the force of the biceps contracting it provides extra force to the ball.

•The triceps muscle needs to contract in order to keep the biceps muscle from relaxing ,

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.