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The output of your command "$ ps -efa | grep apache" is:

root      198064       1  0 May03 ?        00:00:02 /usr/sbin/apache2 -k start
root      198068  197991  0 May03 pts/5    00:00:00 systemctl status apache2
www-data  198809  198064  0 00:00 ?        00:00:00 /usr/sbin/apache2 -k start
www-data  198811  198064  0 00:00 ?        00:00:00 /usr/sbin/apache2 -k start
www-data  198812  198064  0 00:00 ?        00:00:00 /usr/sbin/apache2 -k start
www-data  198813  198064  0 00:00 ?        00:00:01 /usr/sbin/apache2 -k start
www-data  198814  198064  0 00:00 ?        00:00:00 /usr/sbin/apache2 -k start
www-data  198815  198064  0 00:00 ?        00:00:00 /usr/sbin/apache2 -k start
www-data  198851  198064  0 00:00 ?        00:00:00 /usr/sbin/apache2 -k start
www-data  198855  198064  0 00:00 ?        00:00:00 /usr/sbin/apache2 -k start
www-data  199288  198064  0 00:07 ?        00:00:00 /usr/sbin/apache2 -k start
www-data  200460  198064  0 00:56 ?        00:00:00 /usr/sbin/apache2 -k start
www-data  200767  200766  0 01:28 ?        00:00:00 /bin/sh -c ps -efa | grep apache
www-data  200769  200767  0 01:28 ?        00:00:00 grep apache