You are going to do some research on types of seating and then an analysis of one type.
An example is below, but does not cover all the possibilities.
Make sure you think of lots more options to add to yours.
You now need to embed this Google drawing into your Google site.
Make sure the sharing settings of your drawing are set to "open to the public".
Now you need to decide what type of seating you are going to focus on.
Safety, materials, comfort, strength, weatherproof, surface finish, size, proportion, colour, construction, stability, legs, back, seat, texture
An example of this is shown here :-
You now need to embed this Google drawing into your Google site.
Make sure the sharing settings of your drawing are set to "open to the public".