The food we provide us energy in the form of calories, which is required to perform daily activities and survive. This energy allows us to breathe, walk or run, laugh and even helps in the circulation of blood in the body.
The calories varies with the age depending upon age, height, sex and activity level of the person. Calories are required to be higher during the teenage age as it is the period of rapid growth and development. In boys an average of 2800 calories in a day is required but for girls an average of 2200 calories a day is required.
B) Flu is easily transmitted from person to person.
If there is a very big population density, it means more people are present in a small amount of space. Thus they will come into contact more often and the virus is likelier to spread more rapidly.
The theme is the writer's view of or comment about the subject. The answer to your question is D. I hope this is the answer that you are looking for and it comes to your help.
