My last points But it's worth it if I make poeple happy

Based on the sentence, what does a studious effort require

Riddle me this: i am first in earth, second in heaven, appear two times in aweekyou can only see meonce in a year, althoughi'm in the middle of sea. what am i?

What painting has these characteristics? .a composition with simple shapes .shows unity through shape and color. has balance .shows variety in poses .has movement through shape and color