Abraham was 100 years old and Sarah was 90 years old.
Answer:
Naturalistic observation
Explanation:
Observation is to watch what happens as a method of research.<em> Naturalistic observation is a research method that consists of observing the subjects in their natural environment without interventing.</em> In the example given this kind of observation happens because the observer is not interventing.
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Answer:
An executive agreement is an agreement between a president and the leader of a foreign state/country.