Anthony decided to conduct a speech on a campus proposal to build a new student union. He decided that a survey of his classmates would help him determine whether or not his classmates support the proposal. By doing this, he is conducting .

By doing this, he is conducting primary research.

Explanation:

Secondary research uses sources such as books and journals, that is, sources that present information, data, and conclusions found by someone else who conducted a research.

On the other hand, primary research is the one conducted by the very person interested in knowing the results or, at least, by someone hired by them. Primary research goes directly to the original source - the audience, the customers etc. One of the most common ways of conducting it is by interviewing the people. As we can see, that is what Anthony did. He went straight to the source, his classmates, to interview them on their opinions of the proposal. Anthony is, therefore, conducting a primary research.

the underlined phrase is an example of : understatment