Question

a+challenge+is+not+just+any+problem+but+an+opportunity+for+progress+analyse+this+statement

Answer 1

a challenge is not just any problem - main clause

but an opportunity for progress -main clause

compound sentence

Answer 2

A challenge is not just any problem but an opportunity for progress.

We called challenge to those which can be overcomed.If we face a challenge then after facing that challenge we progress and goes to face another problems of higher level.Hence challenge is an opportunity to progress

Hope it did a little bit help to you