should a 11 year old take gummy vitamin d? also is it normal for there hair to fall out if they don't have enough vitamin d?

no

a 11 years old child should have the vitamin d from food and from sunlight

no

Explanation:

you can get it from food and the sun

answer; the correct answer is desert plants;

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.