Answer:
The correct answer is "two participles"
Explanation:
The two participles found in the sentence are:
Option 1) "no verbals" is incorrect as there are verbs in the sentence
Option 2) "one gerund" is also incorrect since gerunds are formed by bare verb-ing and ALWAYS act as nouns. In this case, the word "surveying" is an adjective; therefore it is a participle.
Option 3) "one participle and one gerund" it is also incorrect since there are no gerunds in the sentence.