I believe the answer is: Eat a well-balanced diet to increase energy and immunity
Even though physical activities improve both our energy and immunity in the long run, they are not as significant as maintaining well balanced diet in your life.
You need to make sure that you get your nutrients from various source of non-processed food in order to fulfill both your macronutrients and micronutrients.
They can make you feel stressed and or sad.
Individual decision making is more limited than collaborative decision making because as an individual you would only have one or two points of view on the subject as well as knowledge and ideas. If you were to work with more people to decide on something then there would be a good chance that everyone would be able to pitch in ideas and different points of views to overall decide.
The moons gravity is much less than the earths gravity approximately one sixth. So a 100 kg astronaut weighs 980N on Earth. On the moon, the astronaut would weigh only 162.2N. however, the astronauts mass is 100 kg wherever they are.