Thus they would be more comfortable in a cold, dry climate than in a hot, humid climate because the former would be helpful in getting rid of the extra body heat.
(they; would be; more comfortable; because the former would be helpful in getting rid of the extra body heat) (the former; would be; helpful in getting rid of the extra body heat)
they the former
would be would be
more comfortable because the former would be helpful in getting rid of the extra body heat
helpful in getting rid of the extra body heat