Which detail BEST supports the central idea of this text?
A) Windows may have different ways of retaining energy.
B) Repairing air leaks can reduce costs and energy usage.
C) Fireplaces are an important source of energy in homes.
D) Checking energy efficiency can also reduce fire hazards.

You didn't add the text, but usually the main idea is in the first sentence of a text.

postive, comparative, superlative - good, better, best

recall how we defined nouns as words capable of having plurals and possessive endings. adjectives (and their first cousin, the adverb) also have a feature that distinguishes them. they come in three states. first, the raw adjective—in its positive state—merely describes the noun modified; it doesn’t care about how this particular person or thing stacks up against other members of the same noun class

its c

explanation: