Which of the following is a common type of functional fitness exercise?

The squat is a common type of functional fitness exercise because it closely mimics everyday movements, such as sitting down and standing up, which are fundamental to daily life. This exercise engages multiple muscle groups, particularly the legs and core, making it effective for developing strength, stability, and balance. Functional fitness focuses on enhancing the body's ability to perform real-life activities, and squats play a crucial role in improving overall mobility and strength needed for various tasks.

In contrast, while the bench press and deadlift are indeed strength exercises, they do not address the same range of motion or functional capacity that squats do in relation to daily activities. Additionally, the bicep curl is more isolated and focuses primarily on the arm muscles without engaging the larger muscle groups or mimicking functional movements as effectively as the squat.