A teacher wants to create a language-rich environment in her class. She should:

A language-rich environment, as per NCF 2005 and language pedagogy principles, means creating multiple opportunities where children encounter language in meaningful contexts — seeing it (print-rich displays), noticing it (in stories, songs, conversations), and using it (in interaction, writing, speaking). Option 3 captures this comprehensive approach. A language lab (option 1) is too narrow and technology-dependent. Option 2 shifts responsibility to parents. Option 4 restricts natural multilingual expression and contradicts the multilingual-as-resource principle.