Question

mournful means :
so extremely ugly as to be terrifying
filled with or evoking sadness
pouring in abundance
caused by the invasion of the body by microorganisms

Explanation:

The word "mournful" is an adjective related to feelings of sadness. It describes something or someone that is full of or causes sadness. The other options describe different concepts such as ugliness, abundance, and medical - related invasion, which are not related to the meaning of "mournful".

Answer:

B. filled with or evoking sadness