The main reason is that the USA is in the Northern Hemisphere & Australia is in the Southern Hemisphere. It has all to do with the tilt of the earth as it revolves around the Sun. Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun.
The best answer to this question where the voyage would go through and the type of ecosystem in the Canal area of Panama is that its a Rainforest. I hope you are satisfied with my answer and feel free to ask for more if you have questions and clarification
Straw and mud or clay, or otherwise called adobe (uh-dough-bee)
It goes horizontal. You can't really say it goes from left to right or other way around. However, the more degrees west, the further to the left. More degrees to east, more to the right