Study the image. The sun is in the sky. Clouds with blue arrows pointing down toward water. The arrows are circled. An arrow is pointing from the water inland showing wind direction. Red arrows are pointing up from the land to the sky.

What do the arrows in the circle indicate?

Warm air is rising.
Cool air is sinking.
Cool air is less dense.
Warm air is more dense.

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.