Answer:
washington the father of our country, was the first u.s president.
Explanation:
Rub lavender oil and peppermint oil on your temples.
<span>Experiments in which all variables are identical except for one are called controlled experiments. This where an observer tests his hypothesis by looking on changes that were brought about by one variable. The results are always dependent on one adjusted variable.</span>
Teamwork . They might’ve also developed tools to help or maybe animals idk