Final answer:
Ravi should gather one discrete sample per location each winter, labeled with the time, date, and location to effectively collect and analyze his data.
Step-by-step explanation:
Ravi is collecting data and analyzing a discrete sample from each season on the lake he ice fishes each winter. The most likely way he would collect his discrete samples from each location on the lake is by gathering one sample per location each winter and labeling each with the time, date, and location.
This strategy allows Ravi to maintain the distinct characteristics of each sample without any cross-contamination that could occur if samples were mixed. It also provides context for the data, which could be important if he needs to assess changes over time or under different conditions.