\"eople who respond to stressful situations with short-term anger or
indignation have a sense of control and optimism that lacks in those
who respond with fear.\"
This sounds odd - it would usually be 'is lacking' rather than
'lacks'.
I don't think so .
lack isn't used in the form of lacking .
Because it isn't a continious verb but a temporary verb.
You can refer to a dictionary to see the usage of the word "lack"