Which Application Insights data type should you use to satisfy the scaling telemetry requirement for Policy Service?

An Application Insights metric is the correct choice for tracking scaling telemetry. Metrics are numerical values that are aggregated over time, making them ideal for monitoring performance indicators like CPU usage, memory consumption, request rates, or instance counts, which are crucial for understanding and reacting to scaling needs. An Application Insights dependency tracks calls from your application to external services, which isn't directly related to internal scaling telemetry. An Application Insights event is a discrete occurrence, suitable for user actions or specific application events, but less efficient for continuous numerical data. An Application Insights trace is a log entry, useful for debugging and detailed logging, but not optimized for aggregate performance data like metrics.