This is where you enable or disable these effects. More information about these effects can be found here.
Use this option to enable or disable tesellation for the respective objects (see also Viewport Tessellation).
Use this option to enable or disable an fast approximation of Ambient Occlusion (see also SSAO).
This option defines if sky reflections should be shown in in reflective surfaces (see also Reflections).
Depending on the graphics card and driver used, different levels of anti-aliasing are available here.