For a project a needed to ask 25 people: Do you think vegetarianism is good for the environment ?

Vegetarianism while it may be slightly better for the environment, it is not as good for you as your not getting much protein (assuming that you eat a balanced meal). By being vegetarian, your carbon footprint on the planet is reduced.

Hope that helps

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.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.