A car that pitches and tosses in normal driving and leans heavily to the side in turns is likely to have trouble in which of the following systems?

When a car exhibits behaviors such as pitching and tossing during normal driving, as well as leaning heavily to the side while turning, it indicates issues with the suspension system. The suspension is responsible for maintaining tire contact with the road, absorbing shocks from bumps or obstacles, and ensuring stability during turns. If the suspension is failing, it can lead to excessive body movement, making the ride uncomfortable and possibly dangerous, especially during cornering.

A properly functioning suspension helps to distribute the vehicle's weight evenly and keeps the tires in contact with the ground, which is essential for control and handling. Therefore, when you observe significant body roll or instability, it typically points to problems with components such as shock absorbers, struts, or springs found in the suspension system.