This phenomenon occurs cyclically.

He has an introverted personality and struggles to speak in public.

He has a deep interest in classical literature.

That disease could potentially have fatal consequences.

This report provides a comprehensive analysis of the problem.

Compulsory education is important for all children.

Our picnic was cancelled due to the sudden rain.

He showed a skeptical attitude towards the proposal.

I think he should be treated preferentially.

He started studying independently.