Which of the following provides an example of humans adapting to their environment? building a house with a lot of insulation in a cold climate digging irrigation canals for better farming all of the above cutting local trees for firewood

Out of the choices given, all of them provides an example of humans adapting to their environment. Humans had to have homes with insulation to survive winters, they needed to irrigation to help grow crops, and they had to learn to use the trees for firewood. The correct answer is all of the above. 

Ice melting no wait thats global warming

This would be an open primary. a closed primary people can vote only prior to election day if the party if they are registered. independent voters can not participate. there is not a wide-open primary, but there is a semi-open primary.