Complex sentence: Unfortunately, the lack of exposure to language, although independent of other developmental processes, is a problem for many deaf children, as they are an at-risk population for not receiving language during the critical period for learning language.
Split into simpler sentences: Unfortunately, the lack of exposure to language, although independent of other developmental processes, is a problem for many deaf children, as language development is still crucial. Deaf chidlren are an at-risk population for not receiving language during the critical period for learning language.