What type of annoying insect is named for a colorful article of clothing?

Yellow jacket.

Explanation:

In North America the yellowjacket or yellow jacket is one of the common name of a social  predatory wasps of the Dolichovespula  and genera Vespula.

In other English-speaking countries we can name these as simply as "wasps" to the members of these genera. Like eastern yellow jackets most of these are black and yellow in color.

Some are black and white and others may have red abdomen background colors instead of black.

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and colour.

explanation:

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."