Question

In the sentence "Historically, energy sources for train locomotives have been horses, steam, gravity,

electricity, and gas," "horses, steam, gravity, electricity, and gas" is a compound what

Answer 1

The words are not compound in nature. They are simply a collection of nouns all of which historically were a source of energy for train locomotives.

Step-by-step explanation:

In order to qualify for a compound noun, a word must be made up of two or more nouns. For example, "tooth" and "Paste" are nouns all by themselves.

They can be put together to form toothpaste. Another example would be "web" and "page". Together, we have "webpage".

The words indicated above don't pass for adjectives, verbs and or adverbs in the context in which they have been used.

Cheers!

Answer 2

Predicate nominative is the correct answer!

Step-by-step explanation:

Predicate nominative

Step-by-step explanation:

Example: Jose Rodriguez + is + an engineer = Jose Rodriguez is an engineer.

Analysis: Jose (subject), is (linking verb), engineer (complement)

Because the complement is a noun (or could be a pronoun), it is a predicate nominative.

Example of compound predicate nominative: "The names of the engineers are Rodriguez and Jones."