Question

kavita refused t0 eat her tiffin decause she was angry​

Answer 1

So, what are you asking?

Answer 2

Kavita refused to eat her Tiffin because she was angry. She can be angry for various reasons.

She may have had a quarrel with the friends or the peers. She may have received a scolding from the teacher.

The boss can rebuke Kabita for her poor performance in job. There can be other reasons too. In consequence she refused to eat the Tiffin.