Personally I would say kinetic energy!
Answer= Because polar bears depend on ice as a habitat to survive the more the temperature is rising and the sea ice melting as a result of global warming there is basically a possibility that the population of polar bears will decline because there will be no home (habitat)left for them to breed(survive)in.
C because i have many mental issues and a family that doesnt support me and my wage is 2$ so
Since a hypothesis is a statement rather than a question, you could simply restate the line given to you in line 1. (That is of course your hypothesis is on the subject of people and social media.)
If I were to make a hypothesis off of that subject I would use something along the lines of:
"People who use social media more than others are more likely to struggle with social skills face to face."
Hope this helps! :)