Short term memory test.
It is often referred to as the test of seven plus or minus 2. The test was developed by a psychologist whose name is George Miller. It was developed in 1956. It is currently one of the most often cited studies in this branch of psychology.
Answer:
it could lead to less trees.
Answer:
I guess it's b but I'm thinking A
Everyone votes on everything
1. Universe
2. Milky way galaxy
3. Solar system
4. Earth
hope this helps :)