Answer:
they are made of nucleotides, sugars, and phosphates!
Communication barriers can be physical disabilities such as hearing problems or speach problems but it can also be the lack of interest, attention differences in viewpoint etc.
If you are a smoker quit smoking. Eat three meals a day, doesn't mean you have to eat a lot. Eat alot of vegetables and fruits - at least 1/4 cup worth a day. Avoid processed/canned fruits as they most likely added sugar to it. Exercise daily at least half an hour a day. Stay hygienic. Eat more proteins than junk food. Lessen the amount of snacks a day to 1-2 each should be 100 cals or below. Avoid eating a lot of carbs as it can raise insulin and make you feel hungry often.
Make a list from most to least important