Topic: Interchange of Parts of Speech,

Best Answer Explained in Below-:

The word "practice" functions primarily as a noun in English, which is why option B is the correct answer. As a noun, "practice" refers to the act of rehearsing or performing a specific activity repeatedly in order to improve one’s skill or proficiency. For example, in sentences like "She goes to piano practice every Tuesday," "practice" indicates the scheduled time dedicated to honing musical skills.

While "practice" can also be used as a verb, meaning to carry out or perform an activity, its usage as a noun is more prominent especially in contexts requiring the concept of habitual or repeated action. This distinction is significant because the question specifically asks for the grammatical category of the word.

In contrast, the other options—adjective (C) and adverb (D)—do not apply to "practice," as the word does not describe a noun or modify a verb, adjective, or other adverb. Therefore, recognizing "practice" as a noun allows us to understand its role in the context of skill development and habitual activity.