[Solved] One of the most important features of development is __________ and as such is the major focus of your text. A) change B) stability C) genetics D) environmental plasticity High Magnification: Refers to the ability of an optical system, such as a microscope, to make small objects appear significantly larger, allowing for detailed observation. Air Space: The portion of the respiratory system where gas exchange occurs; can also refer to the cavity within the alveoli in the lungs. Focus Controls: Features or devices on imaging equipment, such as cameras or microscopes, allowing the operator to adjust the clarity and sharpness of the image. Microscope: An instrument used to see objects that are too small to be seen by the naked eye, enhancing the resolution and visual perception of the observer.