Final answer:
In the provided sentences, the word 'love' functions as a noun in the first and second sentences and as a verb in the third sentence. Each word's form is its part of speech, but its function may change depending on context in a sentence.
Step-by-step explanation:
To answer your questions, we need to identify the nouns, adjectives, verbs, and adverbs in each sentence.
For the first sentence: 'Only (love) could have made Him do this,' the word love functions as a c) noun, since it refers to a thing or concept.
For the second sentence: 'Someday in Heaven we shall share a wonderful (love) feast with Him,' the word love also functions as a c) noun, this time as part of a noun phrase 'love feast' that acts as a direct object.
For the third sentence: 'Do you (love) Him for saving you?' the word love is used as a b) verb, because here it describes an action—the action of loving.
Remember that the form of a word is its part of speech, while its tfunction can vary depending on the sentence.