Question

what and why on earth
many people mistakenly believe that
geo graphy is simply the study of
details found on maps, like nations capitals
and the location of mountain ranges. but
geo graphers are actually concerned
with big questions about planet earth.
they study the features of earths surface,
the atmo surrounding it, and
techno sphere psych

Explanation:

To complete the word "atmo[ ]", we need to form "atmosphere". The root "atmo" combines with "sphere" to make "atmosphere", which refers to the layer of gases surrounding the Earth. The other options "techno" and "psych" don't fit here as "techno" relates to technology and "psych" relates to the mind, neither of which fit the context of the Earth's surrounding layer.

Answer:

sphere