D. Smallpox is your answer
Leg curls are focused on the muscles of the lower leg or hamstrings. Hamstrings are the largest calf muscles which should be exercised and trained frequently. Leg curls can be performed by a lying position. Leg curls should be done properly because, sometimes leg curls can cause back pains and lower back pain.
Answer:
1 - Psychological
2 - Mental health problems, Cardiovascular disease, Obesity and other eating disorders, Menstrual problems, Skin and hair problems, and Gastrointestinal problems.
