Infections may be caused by
A. mutations
B. microorganisms
C. toxic substances
D. climate changes

I would say B

Explanation:

stuff like viruses, bacteria, and etc

B.micro organisms

Explanation:micro organisms such as bacteria  and protozoa results in diseases like flu and malaria.

one comes through sex and the other does not lul im not

the correct answer is: d. the saltine and pretzel are made of flour, yeast, and baking soda, and salt. the pecan contains no flour but it does contain fats. the pecan is a nut that can be consumed as a healthy snack. first of all, pecans are a source of fat (monounsaturated fat), but they provide less fat than some other nuts. pecans are a rich source of dietary fiber, manganese magnesium, phosphorus, thiamin, vitamin e…