Concept:Active vocabulary refers to words that a person can recall and use easily in both speech and writing.Explanation:Active vocabulary consists of words that are used frequently and confidently in daily communication. These words are not only understood but also readily produced. Option A correctly describes this frequent use. Option C refers to recognition only, which is part of passive vocabulary. Option B and D are incorrect because active vocabulary is neither difficult nor used occasionally.Answer:A. we use frequently in our daily life.