Answer:
Cardio Fitness: Swimming, Running, Riding a bike, Jump-rope, Dancing, Riding a bike, Doing a variety of activities
Muscle strength: Jump-rope, Biking, Running
Muscle Endurance: Squats, Push-Ups, Jump-rope, Bicep curls with dimbbells,
Flexibility: Touching your toes, Sit-ups, Yoga, Doing a variety of activities
The testes and the ovaries are the glands that stimulate reproductive cycles.
Cranial nerves, would be the answer.
Because no one has ever explored before