Why so many 'agent' processes run by xfce4-session

[Chris Green]

I have been doing some ssh configuration recently and, as a
consequence, looked at the key agent processes related to Public Key
handling.

On both my xubuntu 20.04 systems I have three agent processes, is this
correct (output from ps):-

chris       1136     965  0 Sep16 ?        00:00:02 xfce4-session
chris       1223    1136  0 Sep16 ?        00:00:00 /usr/bin/ssh-agent /usr/bin/im-launch startxfce4
chris       1524    1136  0 Sep16 ?        00:00:01 /usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1
chris       1898    1133  0 Sep16 ?        00:00:00 /usr/bin/ssh-agent -D -a /run/user/1000/keyring/.ssh

Should all of these really be running, if not then how do I turn some
of them off?  It seems that it's the ssh-agent process 1898 which is
the actual key agent process.

-- 
Chris Green