Principles_art | Social Science homework help

Kindred Spirits is a painting by Asher Brown Durand, a member of the Hudson River  School of painters. It depicts the painter Thomas Cole, who had died in 1848, and his friend, the poet William Cullen Bryant, in the Catskill Mountains. Explain how Durand uses the principles of balance, rhythm and emphasis. How do these principles help unify the composition?