MongoDB installations - Failed to download resource "c-ares"

This was my solution or, better to say, understanding after days of troubleshooting this problem. Homebrew cannot handle internet connections problems; hence if your internet is not stable, Homebrew will crash while trying to download and install any library. Homebrew will write that some library is missing during the installation. I tried to install the needed library separately, but it didn't work for me. In the end, I tried a different internet connection that eventually worked for me.