First off do you mean the game tetris? If so here is the answer:
Tetra is a prefix which means “four” and is used when forming compound words. In tetris, we use pieces (called tetrominos), which are formed by combining 4 small blocks (called minos). There are 7 possible types of tetrominos named after the letters that they resemble: I, O, L, J, T, S, and Z.
C protagonist, because a foil is someone who contrasts greatly from the protagonist to highlight some of the protagonists characteristics, and the antagonist is basically a villain. Not many in an audience will sympathize with a villain, so the answer use be the protagonist, or the hero that faces obstacles and eventually overcomes them.
Answer:
Because she wants readers to understand the story better at a different pov
Explanation: