D.hot air rising and cooler air falling. A is example of radiation or conduction. B is example of radiation. C is example of conduction. D is example of convection
Answer:
Central
Explanation:
The central nervous system.
Infertility is the incapacity to conceive an offspring while erectile dysfunction is the incapacity to get aroused so as to engage in sexual intercourse (mostly in men).
Erectile dysfunction could be caused by stress, cardiovascular diseases, and diabetes. Therefore treating it requires maintaining a healthy lifestyle of nutrition and exercise.
Infertility can be caused by disorders of reproductive organs such as endometriosis and occlusion in the tubes. This can be treated by assisted reproduction (IVF), corrective surgery and education.
