The following are benefits of exercising, except— (A) Boosting the mood (B) Causing obesity (C) Lowering blood pressure (D) Preventing diabetes

Here are the answers to your questions:

1. The following are benefits of exercising, except—

   • (A) Boosting the mood
   • (B) Causing obesity
   • (C) Lowering blood pressure
   • (D) Preventing diabetes

   Exercise helps prevent obesity, it does not cause it.
   The correct answer is $\boxed{\text{B}}$

2. Why are rules important in a game? To—

   • (A) Ensure fair play
   • (B) favour some teams
   • (C) Punish some players
   • (D) Select good players

   Rules are essential to ensure that all players and teams have an equal and just opportunity to play.
   The correct answer is $\boxed{\text{A}}$

3. Which of the following is not a hazard in a playing field?

   • (A) Broken glasses
   • (B) Levelled grass
   • (C) Sharp metal objects
   • (D) Stones

   Levelled grass provides a safe and even playing surface, unlike broken glasses, sharp metal objects, or stones, which can cause injury.
   The correct answer is $\boxed{\text{B}}$

4. Who is the only player allowed to use hands during the game of football?

   • (A) Defender
   • (B) Forward
   • (C) Goalkeeper
   • (D) Midfielder

   In association football (soccer), the goalkeeper is the only player permitted to use their hands within their own penalty area.
   The correct answer is $\boxed{\text{C}}$

5. How many substitutions is a team allowed to make in a football game?

   • (A) 3
   • (B) 4
   • (C) 2
   • (D) 5

   In most standard competitive football (soccer) matches, a team is allowed to make a maximum of 3 substitutions.
   The correct answer is $\boxed{\text{A}}$

6. Which of the following material would make the best skipping rope?

   • (A) Paper
   • (B) Wood
   • (C) Sisal
   • (D) Wire

   A wire rope (often coated in PVC) is durable, flexible, and provides good speed, making it an excellent material for a skipping rope.
   The correct answer is $\boxed{\text{D}}$

7. Why are warm ups always important in a physical education lesson?

   • (A) To make the body warm
   • (B) To make the body tired
   • (C) To prepare the body muscles for the main activity
   • (D) To relax the body muscles for a football game

   Warm-ups prepare the muscles and cardiovascular system for physical activity, reducing the risk of injury and improving performance.
   The correct answer is $\boxed{\text{C}}$