I would guess A. If you think of greenhouse gasses in the atmosphere they trap heat in. that is what causes global warming.
-- One feature of Earth is an atmosphere rich in nitrogen and oxygen.
Very unusual.
-- Another feature of Earth is vast quantities of liquid and solid water.
Very unusual.
-- Another feature of Earth is a range of temperatures near the melting point
of water.
Very unusual.
Answer:
lithosphere, hydrosphere, atmosphere and biosphere
Explanation:
Need 20 characters so la la la :) its the epicenter
Relative age is the age of a rock layer (or the fossils it contains) compared to other layers. It can be determined by looking at the position of rock layers. Absolute age is the numeric age of a layer of rocks or fossils.