The following describes the cause of obesity as a lack of energy balance: more energy in than out=weight gain. Correct answer: A In most people obesity is caused by eating too much and moving too little. If high amounts of energy is consumed and you do not burn off the energy through exercise and physical activity, this will result in obesity.
Answer:
I believe b but it is kinda hard question
The cells in the heart need a constant supply of nutrients / oxygen and to get rid of their waste products ans that why it needs its own special circulatory system.
