Answer:
Explanation:
Measuring the amount of deu terium in the universe allows us to set a limit on the density of ordinary matter of universe. Density of the universe is about 9×10-27 kg m-3, because of the way in which deu terium was created in the Big B ang, an exact measurement of the amount of deuterium would allow scientists to set limits on the models of the great explosion.
Because the earth is tilted on a axis and tilts differently to get the 4 different seasons
Between 50-80 years or even more than 80 sometimes
I think it's C. Sorry
I hope this helps!
