It's essential for most people so they are able to perform their best during the day and get work done to the best of their ability.
Answer from: Quest
the bald eagle got 50 because everything gets 10% of what they consume and since 50 is ten % of 500 hundred that means the grasshopper had to have consumed a plant with 5,000 calories of energy
Answer from: Quest
allowed for the prediction of the properties of missing elements.