The correct answer is B. Plants absorb phosphates and sulfates which are present in the soil through their roots.
Sulphate is termed as ion which is a polyatomic anion which are salts made of sulphuric acid
Both phosphorus and sulfur are natural occurring elements and they are needed for reproduction and growth by plants.
A cow will eat grass in a field, the grass is the plant and the plant eater is the cow. (Srry if this is not what your looking for)
They are ineffective against viral infections because viruses can not be treated with antibiotics.