Analyze the paragraph.
Research focused on second language acquisition (SLA) is no longer directly
focused on language teaching as it was in the early stages of the development of this
academic area. As such, some questions that guide SLA research include how
languages in general are learned and the relation with first language acquisition. The
answers to these questions give us a deeper understanding of the nature of language
and its complexities, which, in turn, may further aid in language teaching
methodologies. Some milestones in the course of SLA research include: contrastive
analysis, language transfer, error analysis, and universal grammar. ____________ is
based on the idea that learners draw heavily from their native language to learn the
additional language, leading to the transfer of certain forms and meanings that may
reflect differences in learner performance. (Perna, C. B. L., Molsing, K. V., & Ramos,
Y. S.)
Choose the correct milestone in the options below that fills the blank above.