The zambezi river is in Southern Africa.
You can conclude that Florida lacks in bedrock because sinkholes form where there is low amount of such.
Whoch birds are migrating is my answer because, for a the birds are migrating because its winter for c birds are already going since one of the questions are where the birds are going, and d is that they are going there to not freeze, the only logical choice FOR ME is B
Overcrowding and slums developed in many impoverished countries in the 20th century, mostly due to large migrations to cities from people looking for work.
D. Greenhouse gas feddback
I'm not for sure but I believe this is the answer sorry if I get it wrong in advance
