What are the options? Need to see the poem or options to answer this.
The participle in this sentence is "sweating". It's a participle of the verb " to sweat" and it's a present participle: which we know because it ends with an -ing (past participles end with "-ed).
Answer:
If the boys find anything interesting or unusual while digging, they're supposed to tell Mr. P or Mr. Sir. And if the Warden likes what they find, they'll get the rest of the day off with no more digging.
Explanation: