Given your image, Avast’s memory use is moderate added together it comes a little over100MB
I also see BraveSoftware Update and the (32 bit entry), which is also low. However if there was a software update in process this could cause a spike in Avast CPU activity and possible memory usage. When RAM is high order the Task Manager by RAM usage and see just what is the highest user.
The biggest culprit for memory usage on my system is my browser Firefox, the more tabs open the more RAM used. I only have 8GB of RAM on this system and it doesn’t often get what I would call high 75-80% or higher.
RAM is there to be used, it speeds up your system, by not having to constantly move data out of memory into the pagefile.
Yes its normal. Its called multi-tasking, rather than one process doing multiple tasks.
Just check how many processes are used by your browser, also see my second image and firefox is using 11 processes grouped together. Currently it is using 10 processes grouped together.
I have never used the Brave browser, so I couldn’t begin to think why this would result in such a high number of processes (something for the Brave forum perhaps).
Given its privacy credentials, I don’t know if these privacy functions/extensions could be reason for all of these running processes.