Answer:
The answer is "It is used as an adjective to describe the noun Roger."
Step-by-step explanation:
A participle is a word that is partly a verb and partially an adjective. A participle is simply a verb partaking the elements of a verb and an adjective.
In the example,
Lying to the best of his ability, the word 'lying' qualifies the noun, 'Roger' as an adjective does. It originates from the verb, 'lie.'