Answer: Both options, "know" and "know," can be used in this sentence, but each conveys a slightly different nuance:
Step-by-step explanation:
"My brothers know how to draw": This option suggests that your brothers have the ability or ability to draw. It implies that they are capable of performing the action of drawing.
"My brothers know how to draw": Although grammatically correct, this option is less common and sounds less natural in Spanish. "Know" is more commonly used to refer to knowledge of something or familiarity with someone, not so much for practical skills like drawing. It's probably understandable, but "know" would be the more natural choice in this context.