Answer:
1. The participial phrase is: "seen on the New Mexico flag"
2. The present participle is: "growing"
3. The participial phrase is: "Leading the country in energy research and development since 1945"
4. The sentence which contains an elliptical adverb clause is: A. Ella spent more time studying than Talia.
Step-by-step explanation:
A participial phrase is formed by a present or past participle followed by a complement (nouns, pronouns, or a phrase). Participial phrases function as adjectives in the sentence, modifying a noun. In sentence 1 the participial phrase begins with the past participle "seen", while in sentence 3 it begins with the present participle "leading".
A present participle is formed by the base form of a verb and -ing. Example: worrying, dancing, gliding, screaming.
Finally, an elliptical adverb clause functions as an adverb in a sentence, modifying a verb, an adjective, or another adverb. It is called elliptical because one of its elements is implied. In option A of number 4, the element that is implied is the verb that is supposed to follow the subject "Talia":
- Ella spent more time studying than Talia (did).