The participle is "digging." Most participles end in -ing. It modifies "man", describing what the man is doing.
The Oxford English Dictionary is best for finding the "Descriptive" meaning. This is the literal meaning, known also as denotative. It can also help you with figurative meanings, but it is not its primary purpose.
Answer:
C
Explanation:
it's important to cite sources you used in your research for several reasons: To show your reader you've done proper research by listing sources you used to get your information. To be a responsible scholar by giving credit to other researchers and acknowledging their ideas.