What does an animation sequence action do?
a. changes the order of the animations in a game
b. plays an object's animation
c. plays all the animations in a game
d. adds frames to an animation

Plays all the animation in the game.

Explanation:

An animation is usually created by splitting the scenes into each frame and all the frames are played one by one to create a feel of animation. There are many multimedia software to create wonderful animations.

Animation sequence does not change the order of animation though it is possible it is irrelevant in this context.

Might be animation sequence relates to adding frames but in the question animation sequence action has been given so it is closely related to playing of animation.