Answer: Hierarchical diffusion
Explanation:
Hierarchical diffusion describes a situation where information is first shared amongst certain people such as a group of connected individuals and then those ones spread it as well to others.
This is what happened here. President Obama's tweet was first seen by people who followed him and so were connected to him on Twitter and then as they retweeted it, more people saw it and retweeted it as well leading to the tweet being shared to millions.
Answer is Retrograde motion
Most of the time planet moves in expected path near the ecliptic which is east to west. Some times each planet turns around and moves to the east for a period of time, then it turns around to head in west direction again making a loop or zig-zag against the star background. This is called retrograde motion. Thus retrograde motion is the change of direction of the planets in loop.
Hawaii : high precipitation -correctly matches the state with its precipitation.
Answer: D
Explanation: The scientific method:
1. ask questions
2. do research
3 construct hypothesis
4 test with experiment
5 analyze results
6 take down data
:) stay vool
London population 8.6 million since 2015 white people in the London .4.3 population .etc
