Answer:a, observations
Explanation:
They believe that people are changed by their surrounding environment and to see if there are any changes one has to observe their behaviours.
You can see the Washington monument and the Lincoln memorial.<span />
Answer: Source 1- Who were Bell and Gray? Alexander Graham Bell was an Inventor. And Elisha Gray was a gifted electrical engineer.
Source 1- Bell was a inventor, and Grey was a engineer.
Source 1- Why did they create the inventions? They created the inventions because people wanted more and the telegraphs weren't enough.
Source 2- I would say they both had a hand in the first telephone. People are still debating on who is the true inventor. Even though Gray submitted the application first.
Explanation:
Solo killers takes more lives than team killers because having team killers makes it difficult to to carry out and executing the plan in killing people, a contrast in solo killer where the killer can easily move, socialize, and execute the killing in short span of time.