You can insert an image into the body of an email or you can add an attachment:
Option 1: Insert image into the email body
- In a New, Reply, or Forwarding email, long-tap on the body of the email
- Tap "Insert Photo"
- Choose where you would like to access an image from
Option 2: Add an Attachment
- In a New, Reply, or Forwarding email, tap the Paperclip icon at the top
- Choose from your "Recents" or "Browse"