Deciduous forests can only be found in north america.
a. true
b. false

No, this is false! (b).

Deciduous forest can be found all around the globe in both Southern and Northern Hemisphere.
For example, much of Europe and the European part of Russia is covered in the deciduous forest.

Also parts of Australia and New Zealand are covered in it. 

Answergranulation;

The peak above is part of the  sierra madre occidentals ,  a chain of volcanic mountains that runs through the middle of central america.