Exercises 146 to 160 will focus on tactics that involve trapped pieces (or pieces already limited in their mobility) in some way or another, ranging from easy to hard.
Solution
1. Bc7 traps the black queen.
The key to finding tactics that trap pieces, is to take note of the mobility of the pieces. Whenever you notice a piece that is very limited in its mobility, then you should logically look for ways to trap it.