For these questions, choose the option that best completes the gap(s) After too much exercise, some people…

Step 1: Analyze the question You need the word that correctly completes the sentence: "cramp ... is caused by the ......... of the muscles."

Step 2: Explain the concept A cramp is a sudden, painful, involuntary tightening of a muscle. So the missing word must describe a muscle tightening or shortening.

Step 3: Check each option

• A. contraction: This means the tightening or shortening of a muscle. Cramp happens when a muscle contracts suddenly and stays tight. ✔
• B. restriction: This means a limit or control placed on something. It is not used for muscle action.
• C. conscription: This means compulsory enrolment into military service. It has nothing to do with muscles.
• D. relaxation: This is the opposite of what happens in cramp. A relaxed muscle is loose, not painfully tight.

Step 4: Answer The correct option is **A.

Tip: Look for the word whose meaning fits the context, and cross out the ones that clearly belong elsewhere. "Conscription" always relates to the military, and "restriction" to rules or limits. Remember: cramp = contraction (both begin with "c").