How is altitude indicated on approach plates?

Altitude is indicated on approach plates through numbers listed next to procedures. This is because these numbers provide essential information regarding the minimum altitudes that need to be maintained during the approach phase of flight. For instance, they indicate the minimum safe altitude for maneuvering, as well as the altitudes associated with various segments of the approach, such as initial, intermediate, and final approach fixes. This information is crucial for pilots in ensuring safe and effective altitude management during an approach, thereby helping them meet the necessary requirements for safe landing.

The other choices might include alternative forms of information presented on approach plates, but the key to understanding altitude requirements specifically lies in the numerical information directly associated with the procedures depicted on the plate.