Answer:
Over the course of one solar cycle, the Sun's emitted energy varies on average at about 0.1 percent. That may not sound like a lot, but the Sun emits a large amount of energy – 1,361 watts per square meter. Even fluctuations at just a tenth of a percent can affect Earth
Explanation:
b
I'm gonna say D HOPE IT HELPSSSSSS
Because the heart don't have the nerves to fell stressed, the most reliable organ to measure stress would be the brain. hope this helps
