Answer:
a. metal teapot
Step-by-step explanation:
Metals are shiny, because the electrons in them reflect light, making metal teapots shiny too.
Wood isn't shiny unless you do something to it, cloth isn't shiny either.
As for brick walls, when was the last time you've seen a shiny brick wall?
Those aren't shiny either.
From the list of options, only metals are shiny.
Which means a. is the correct answer.