select the sentence that uses a noun clause to combine the ideas below. Also identify the function of the noun clause.

1.)Water aids digestion. It is really true.
a. that water aids digestion is really true.
b. water aids digestion; it’s really true.
c. it is really true where water aids digestion.
d. water that aids digestion is really true.
e. subject
f. direct object
g. predicate noun
h. object of a preposition
i. appositive

A noun clause is a group of related words with at least a subject and a verb that that does not express a complete thought on its own and that functions as a noun in a sentence, thus, it can function as a subject, object, predicate noun, or others. We can also identify this type of clause because it normally begins with the words that, what, whatever, whether, when, where, who, whom, whoever, which, whichever or why.

In this case, the sentence that uses a noun clause to combine the two ideas is a. that water aids digestion is really true. “That water aid digestion” is the noun clause because it has both a subject and a verb (water and aid), it begins with “that,” and it functions as the noun of the sentence because it is the condition or situation being described.