Defense minimizes opponents possession time. The two types of defense are man-to-man and zone. In zone, instead of guarding a player, each defender is responsible for guarding an area of the court and any offensive player that comes into that area. But for man-to-man defense, a coach assigns each player on the line-up a specific offensive player to follow and defend on the court.
The thymus lies in the chest behind the breastbone and above the heart. Relatively large in infancy, it increases in size until puberty and thereafter shrinks to only a few grams in old age.
I would tell him that other foods give you vitamin A other than carrots and he probably gets the recommended amount of vitamin A without knowing it, or he could just eat another carrot if he's that worried about it.
