Optimise source code and install capcha

I need a capcha installed into the 'contact' page of [login to view URL] .My site is also slow and requires optimisation of source code. This is the information from my host: I found that your site is consuming more memory usage due to which is showing internal server error. These are the logs for your reference :- ================================= kitweb 180743 0.0 0.0 18332 1552 ? DN 01:38 0:00 | \_ /opt/suphp/sbin/suphp kitweb 180720 0.1 0.1 221128 8684 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180736 0.2 0.1 221128 8684 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180739 0.0 0.0 18332 1544 ? DN 01:38 0:00 | \_ /opt/suphp/sbin/suphp kitweb 180682 3.5 0.3 252608 30980 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180726 0.2 0.1 221128 8684 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180704 0.8 0.0 0 0 ? ZN 01:38 0:00 | \_ [php] <defunct> kitweb 180708 3.5 0.3 252608 30984 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180749 0.0 0.0 18332 1548 ? DN 01:38 0:00 | \_ /opt/suphp/sbin/suphp kitweb 180750 0.0 0.0 18332 1552 ? DN 01:38 0:00 | \_ /opt/suphp/sbin/suphp kitweb 180705 3.5 0.3 252608 30976 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180712 0.1 0.1 221128 8680 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180636 0.2 0.0 0 0 ? ZN 01:38 0:00 | \_ [php] <defunct> kitweb 180691 3.6 0.3 252608 30980 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180751 0.0 0.0 18332 1552 ? DN 01:38 0:00 | \_ /opt/suphp/sbin/suphp kitweb 180752 0.0 0.0 18332 1556 ? DN 01:38 0:00 | \_ /opt/suphp/sbin/suphp kitweb 180728 0.2 0.1 221128 8684 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180703 3.6 0.3 252608 30980 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] kitweb 180707 3.6 0.0 0 0 ? ZN 01:38 0:00 | \_ [php] <defunct> kitweb 180753 0.0 0.0 18332 1560 ? DN 01:38 0:00 | \_ /opt/suphp/sbin/suphp kitweb 180733 0.2 0.1 221128 8684 ? DN 01:38 0:00 | \_ /usr/bin/php /home/kitweb/public_html/[login to view URL] ================================= Please check the resource usage from - cPanel >> Resource Usage. There was not any specific file which was causing load on the server while executing. It was a whole account as all the files are connected with each other. In order to resolve this issue you will have to contact your developer and get your source code optimized.