Flood relief centre evacuated because of flooding

The video tutorial discusses a concept, starting with an introduction and setup, followed by a brief conclusion and summary.

What do you think is meant by 'let it happen'?

In what situations might someone say 'let it happen?'

How would you interpret the response 'OK.' in a conversation?

Can you provide examples of when 'OK.' might be used?

What significance do you think the phrase 'They are.' holds in context?