Why is it so difficult to study how the brain creates, how this system within our brains evolved, and the possible capabilities?

In the artwork "that gentleman" by andrew wyeth how intense are the colors? what are their individual values and temperature?

1520 is the date scholars generally give for the end of the? a. northern renaissance b. high renaissance c. gothic period d. mannerism period

Which statement about sculptures depicting humans made in ancient egypt, greece, and the roman empire is true? question options: they had arms and legs that didn't protrude so the sculptures would last an eternity. they could be made using formulas, could show ideal beauty, or could be realistic. they showed the common man. they were made using bronze.