Vitamins are organic nutrients needed in small quantities to perform specific functions. They do not provide energy but are necessary in the use of energy. Vitamins aid an animal by helping regulate body functions, keeping the body healthy, and promoting resistance to dis- eases

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.

Ibelieve it's choice d.

The skills he need is to practice seeing and hearing

Your doctor will speak with you regarding your concern for all the the above he / she will maintain regular checkups with you regarding the yes answers you answered in the questionnaire