The answers are the following:
9. D. gerund
Gerunds are action words but considered as a subject of the sentence. it has a specific form which is verb+ -ing.
10. B. participial.
Participles and gerunds are similar with their form, which is verb + -ing, but they differ by their functions. If gerunds are used as a subject, participles are used as an adverb or adjective.
Answer:
I think it's really important to think about one's actions before carrying them out.
The importance of understanding what is happening in countries like America will impact us.
Although I like to think that this sign thing will improve.
Individuals of Christian faith often go to Church on Sundays.
I would sell ice-scream in the Arctic by focusing more about the taste of the ice-scream, instead of the temperature of the ice-scream. And persuading them into wanting to taste what I’m talking about.