Answer:
Yes it is a complex sentence
Explanation:
because a complex sentence contains an independent and atleast one dependent clause here after the rain ended is a dependent clause where, the sky became blue is an independent clause as if we only write The sky became blue it can be understood but if we write After the rain ended only nothing is clear and this cannot be understood. A complex sentence can be separated by comma.
Answer:
Should these sentences be about a certain topic?
Answer:
Hello! I would recommend setting a schedule personally.
Explanation:
I set a schedule. For example, I study/do work for 2 hours and I rest for 30 minutes. I would also recommend taking breaks. It's not easy to study for a long time, so resting your eyes for a couple of minutes can be very important. Hope this helps!