Dear Sruthi
you can not "subactivate" a business function. If you activate OPS_EHS_CI_1 any new option is there. I is not mandatory to execute then any further cutomizing activity; you need to check what you need nad how you woul dliek to achieve the business demand.
Keep in mind: a support package delivers legal changes and error fixing; an "Enhancement Package" delivers new implementation options (which are not ! legal driven).
Check may be: http://scn.sap.com/docs/DOC-44643
C.B.