I don't know if their is sopposed to be options but my best educated guess is "Natural"
If both of them were travelling anti parallel to each other. (parallel but in opposite directions)
Answer:
tramwayniceixand 1 otherlearned from this answer. Answer: 1. Micro-evolution is the change in allele frequencies that occurs over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift. 2.
Explanation:
This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift. 2.
Alcoholic fermentation; carbon dioxide. Alcoholic fermentation produces alcohol and carbon dioxide in bread. The alcohol evaporates during the baking process.