I think the answer may be water pollution.
water pollution > Water pollution<span> is the contamination of </span>water<span> bodies (e.g. lakes, rivers, oceans, aquifers and groundwater). This form of environmental degradation occurs when </span>pollutants<span> are directly or indirectly discharged into </span>water<span> bodies without adequate treatment to remove harmful compounds.
source: Wikipedia </span>
Answer: The poet tells us that the insect eats weeds and wattle gum, and has a funny face. It has a big appetite which means that it eats a lot of food but its manners are disgraceful, that is, it does not display good manners.
Explanation:
Answer B is the correct one.