I would think it might be either depression or it could very well be she is not getting enough sleep at night ,and that can cause mood swings. Maybe being the reason she is sad.
I'd consider extra tariffs a bad thing due to it creating an immediate unbalance in an economy. It can destabilize an economies influx of money if their exports get taxed more. China, being a huge trader with the US, creates trade tension as well which could stray into more political issues as they both heavily rely on each other.
Answer:
People selectively breed dogs to reinforce certain traits too. As you likely know, certain dogs are bred for particular reasons, such as hunting, herding, or other purposes. For these sorts of dogs, they are bred so that the ideal traits remain.
Explanation:
Because the earth is at a tilt when we orbit the sun some parts of the earth become in a sense farther and closer to the sun. The earth's tilt is always in the same direction, so it's not really tilting back and forth. If you have a tilted globe at home (or maybe at your town's library) you can use an object in place of the sun and move the globe in a circular motion around it. And it might become a little more clear.
Answer:
A:refusing to trade with other civilizations
Explanation:
Hopefully this helps.