Creating Email Activity on Camapigns distribution

Hi,

I am trying to track responses in Campaign Management.

I have created a campaign, a marketing list containing leads, campaign Activities in Online CRM.

I am distributing the Campaign Activity and Assigning it to my current logged in user.

Can i know how i can create email activities from this distribution and how to get campaign responses ?

Where can i check these email activity creation corresponding to that in CRM,

Thanks for any help!