Answer:
b. segregation
Explanation:
The idea of crossing over is the random segregation of chromosomes. This is how unique combinations of genes are generated that make us unique individuals, even compared to brothers of the same father.
Then all kinds of predictions about segregation are broken, and it is left to chance.
Kinetic energy plus the sum of two types of potential energy make up mechanical energy. Kinetic energy is the energy of motion.
Erosion is brought about by the forces of nature or human activity: water, wind, earthquakes, mining, quarrying, etc. In the desert, there is very little water that can cause weathering or erosion, so the most probable answer is wind or maybe even animal activity.