Choose vs. Decide
Choose: To select from a number of possible alternatives; decide on and pick out. To select (a person, thing, course of action, etc.) from a number of alternatives. To pick out, select, or choose from a number of alternatives.
Decide: To settle conclusively all contention or uncertainty about. To make up one’s mind about. To influence or determine the outcome of. To reach, make, or come to a decision about something. To bring to an end; settle conclusively.