Robins migrate south during the winter months to avoid harsh conditions and then return north during the summer. What environmental condition are the robins most likely responding to in order to determine when the seasons are changing?

A.)The tilt of Earth on its axis.
B.)Fluctuations in predator populations.
C.)Changing length of daylight hours.
D.)Increasing availability of water.

The american public was excited by the invention of the railroad system. true false

Mike and his wife, amanda, are arguing about his in-laws. mike doesn’t want them to visit because they fight all the time when they come to the house and he is worried about the effect that their fighting is having on mike and amanda’s children. amanda finally yells out: “what about our fighting? ” mike replies, “well, that’s different. we fight because we’re having a disagreement, they fight because they hate each other! ” this is an example of

True or false: the eastern roman empire lasted for 1,000 years longer than the western roman empire.