If the control wheel or stick is moved forward, what is the expected result?

Moving the control wheel or stick forward typically results in a decrease in the aircraft's angle of attack, causing the aircraft to descend. This action generally leads to a change in altitude rather than an increase in airspeed. However, when an aircraft descends, it may initially maintain or increase its airspeed due to the pull of gravity, but the primary expected result in terms of the control input is a change in altitude.

The correct choice indicates that by pushing forward on the control wheel or stick, pilots are primarily causing the aircraft to descend. The additional factors of aerodynamic response and physics dictate that while descending, there may be a momentary change in airspeed, but it is not the main result of the action taken on the controls. Thus, this answer accurately reflects the consequences of the input on the aircraft's performance rather than focusing only on airspeed change as a direct result of the stick's position.