You can view the specific contact activity history for any given email address by searching for that email address or clicking on it from Reports, and looking on the right hand side, where you can scroll to see all activity for that person:
The Events on the right hand side are as follows:
Email Sent: Means that the campaign name below “Email Sent” was sent to that person.
Open: The person opened the campaign.
Click: The person clicked a URL in your campaign.
Unsubscribe: The person clicked a link to Unsubscribe.
Spam Report: The person marked your email as Spam.
Bounce: The email hard or soft bounced.