Building a waterfall on the grounds of the home. is it A) infinitive B) gerund or C)participle?

Which statement would you identify as being correct? a. it is important to learn the etymology of every word in a text. b. it is important to understand the etymology of every word in a text. c. it is important to study the etymology of every word in a text. d. it is important to study the etymology of some words in a text.

Which word is the comparative form? hyper best less most fruitful

In figure 4 of the telephone components what do the labels lettered a to e