Bitmap will not be active until you have converted your image to grayscale mode.
Color Table will not be active until you have converted your color image to Indexed Color mode.
"Share on Behance" is below Generate under the File Menu, but I have never used it.
Here is the Help on it: Photoshop Help | Share your work on Behance
I suppose it would have to be set up first and available in your country.