Select the most appropriate synonym of the given word.

CONSTRAINT

Burden

Constraint:  something that limits or restricts someone's actions, choices, or freedom. It's a restriction or limitation that can be physical, social, or psychological.

• Hazard: a danger or risk, not necessarily a restriction or limitation.

• Burden: a heavy load or something that is difficult to bear. When something is a burden, it weighs you down, just like a constraint limits your freedom. In the context of constraints, they can often be burdensome because they create difficulties or limitations.

• Concern: a matter that causes worry or interest and doesn't directly mean a constraint.

• Control: having power or authority over something, which is related to, but not synonymous with, constraint. Control involves managing, not necessarily limiting.

Therefore, Burden is the best option.