
Explanation

Monitoring from application: Transact-SQL
Transact-SQL can be used to monitor a customized application.
Trend analysis: System Monitor
System Monitor can provide trend analysis.
From question:
Tailspin Toys has a custom application that accesses a hosted database named TSpinDB. The application will monitor TSpinDB and capture information over time about which database objects are accessed and how frequently they are accessed.
References:
https://docs.microsoft.com/en-us/sql/relational-databases/performance/performance-monitoring-and-tuning-tools