I assume that the question here refers to the process of evolution. The "helpful variations" are small mutations that allow the organism to have a small advantage over other - and this organism can then pass this variation to its children better than other organisms, meaning that with time, more organisms will have it. This will accumulate over time and the percentage of organisms with this mutation will increase.
Answer:
Frustrated by French meddling in U.S. politics, Washington warned the nation to avoid permanent alliances with foreign nations and to rely instead on temporary alliances for emergencies.
Explanation:
Maybe this will help...
https://www.universetoday.com/tag/isaac-newton/
5 years you have to redo it every 5 years I think
This "Necessary and Proper Clause" (sometimes also called the "Elastic Clause") grants Congress a set of so-called implied powers—that is, powers not explicitly named in the Constitution but assumed to exist due to their being necessary to implement the expressed powers that are named in Article I. The Bank's existence is a great example of implied powers: the Constitution doesn't say that Congress has the right to establish a bank, but its defenders claimed that one was necessary to carry out the Congress' power to collect taxes. Hope this helps.