Concept:Children learn best when they can express freely in their mother tongue, as it supports both emotional and cognitive development.
Explanation:The first few years in school help children build language skills and socio-cultural understanding.
Mother tongue is the language they have spoken since birth, so it is natural and comfortable for them.
If children are forced to use another language immediately, they may struggle to express themselves.
Expression of thoughts and feelings is more important than enforcing a school language at this stage.
Allowing the mother tongue builds confidence and a strong foundation for learning other languages later.
The other options — banning mother tongue, forcing parents to use school language at home, or fining children — are harmful and not research‑based.
Answer:They should be allowed to speak in their mother tongue because the expression is important. (Option C)