Acquisition and learning are two independent systems for obtaining a second language. Acquisition is a subconscious process where language is absorbed through meaningful interaction and communication, similar to a child's first language development. It occurs naturally and focuses on meaning over form. Learning is a conscious process that involves formal instruction on rules, vocabulary, and grammar in a controlled environment. While learning tests knowledge, acquisition supports developing skills through use of the language. Krashen asserts that acquisition is more effective than learning for second language mastery.