From the distinct shapes of sand dunes and their features in a desert, a geologist could most likely determine which of the following?
1. The prevailing wind direction in the area
2. The amount and type of sand present in the desert
3. The age of the dunes and how they have been formed
4. The presence of underlying rock formations or geologic features influencing the formation of dunes
5. The potential for ongoing erosion or movement of the dunes in the future.