Malaria, a type of parasite, infects 500 million people each year by infecting the red
blood cells of its host. The virus, HIV, that causes AIDS, reports 50,000 newly infected
persons. Which statement best differentiates the pathogens, parasites and viruses?

There really isn't any information to differentiate... but from trying to understand your question, I'd say the first statement because it clarifies Malaria to be a type of parasite. Also, here is the difference between all three if you need to for future use:

Pathogens are disease-causing microorganisms. Pathogens are of different kinds such as viruses, bacteria, fungus, and parasites. Pathogens can be found anywhere including in the air, food and the surfaces that you come in contact with. While often confused as the same thing, bacteria and viruses are kinds of pathogens.

I hope this helps!

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.