Some producers use chemicals rather than sunlight ,this processes is called chemosynthesis
Few producers live deep below a lake's surface because light penetration decreases with depth, limiting photosynthesis. Without sufficient light, plants and algae struggle to photosynthesize and produce energy, resulting in fewer producers thriving in deep areas of lakes.
Because underneath the ocean the temp is low so there are few producers below 200 m in the ocean. ;D
Below the Surface was created in 1938.
The duration of Below the Surface is 3300.0 seconds.
When you have weird look on your face
I'm adding a link below.
The link below has an easy explanation.
Granite forms below the surface, but it can be found at the surface where it has been exposed by erosion or uplift.
If you were 100 km below the surface you would be in the upper mantle / asthenosphere.
Igneous rock can form deep below the surface as intrusive igneous rock, or on or near the surface as extrusive igneous rock. X Answer is: Igneous
See the link below for a more complete explanation.