Define the following terms:
- medium
- technique
- proportion

Medium: Material in which a work of art is produced.

Technique: How a piece of art is made; the methods used.

Proportion: Relation of one part to another, or of parts to the whole in respect to the size, height, width, and scale

renascimento comercial, que, a partir do século 11, inaugurou definitivamente a baixa idade média, que se estenderia até o século 15.

c. landscape orientation