Which technique of creating emphasis is in primary use in this painting?

the artist primarily used to create emphasis on this painting.

How did brunelleschi solve his problem with the dome of the florence cathedral? a. he created an outer support shell. b. he created many layers of support within the dome. c. he created external supports for the dome. d. all of the above

When did gothic art peak what century.

Does anyone know how to get better at drawing? (any advice is welcome and needed)