To identify properties of light?

Which anatomical feature would you expect to find in the fossil remains of a nocturnal species?

When geographers describe how two places are related to each other spatially, they are describing a. where the places are located in relation to one another b. what kinds of natural environments are around each place c. how each place is changing over time d. what kinds of cultures are in each place

Can you give an explanation of what medc and ledc are.