Final answer:
Erosion by wind and crayon melting in the sun are similar in that both are physical changes triggered by environmental factors, with erosion shaping landscapes and melting crayons changing states due to heat.
Step-by-step explanation:
The two changes in common between erosion caused by the wind and a crayon melting in the sun are that both involve physical changes and both result from external environmental conditions triggering the change. Wind erosion signifies a physical change where particles are removed and transported elsewhere, shaping the Earth's surface over time.
Similarly, a crayon melting in the sun undergoes a physical change from solid to liquid due to the heat provided by the sun's rays. Neither process involves a chemical change where the basic structures of the materials are altered.