Answer:
The answer is statement 1, 2, and 3
Explanation:
A hypothesis is a starting point for further investigation, therefore a hypothesis will always be a possibility at least until it is tested.
Variable is a factor that is liable to vary or change.
A hypothesis without being tested is merely a statement or an explanation made on the basis of limited evidence. Therefore it is unsure whether the said statement is true or not.
A hypothesis can still be proven by further investigation with different variables
Water because hydro means water
Atom,molecule,cell,tissue,organism,population,ecosystem,biosphere.
Solid. it's all stuck and linked together, while liquids are flowing along and gases fly around wherever they please. Hope this helps
I'm not 100% sure, but I'd say the availability of vaccines and medicine.