Geographers use two key questions every day. when using these two key questions to study the migration of birds, a geographer would ask "where are the birds going? " and "" a. what season is it b. which birds are migrating c. when are the birds traveling d. why are they going there

The correct answer to this question is B - the two key questions in geography are intended to obtain certain factual information. Whilst the other possible questions given as answers for this question, such as 'why are they going' give indefinite, opinion-based answers, only answer B. Which birds are migrating would give a definite answer.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.