The focus of informative writing is to explain a concept.
The correct answer is "to explain a concept." When writing informatively, the main focus is on providing information and explaining a particular concept or topic. This type of writing aims to educate and inform the reader by presenting facts, evidence, and explanations related to the chosen subject. To determine the focus of informative writing, you would need to consider the purpose of the writing and whether it aims to share opinions, tell a story, research evidence, or explain a concept. In this case, the answer "to explain a concept" relates directly to the purpose of informative writing.
