Final answer:
The word that matches "vary" is "shift," as it implies change, which is consistent with the definition of vary. Decisions in a game change with varying situations, and a variable represents something that can vary in value. option a
Step-by-step explanation:
The word "vary" means to change or alter in form, appearance, or nature, especially in a slight way; to introduce modifications or slight differences. Therefore, the word that matches "vary" from the given options is a) shift, as shifting implies changing position or direction, which is in line with the meaning of vary.
Regarding the provided references:
In any game, decisions will vary as the situation varies, meaning they will change according to the changing circumstances of the game.
A variable is best described as something whose value can change over multiple measurements, reflecting the essence of something that can vary.
When talking about shapes, objects that vary in shape do not maintain a constant form, indicating that their form can change or differ. Option a