The Enquiry for is the category, which the visitor can select at the time of sending Enquiry. You must add your services, you are providing for users.
The Enquiry Category will be visible here, shown in image
Lets Add the Enquiry Category
Step 1 :
Click to setting button, placed on the right side.
A new box will open.
Step 2 :
Enter your Category name.
And Click on "Add" button