Answer:
I belleive A is the correct answer, here is why
Region: geography, regions are areas that are broadly divided by physical characteristics, human impact characteristics, and the interaction of humanity and the environment.
If that is correct then it is compleetly possible for animals to migrate over different regions
The definition of a Hero is actually more determined by personal and cultural factors B.
It would be hard to say that what a hero is is something that is understood universally given the fact that we have such a diversity in cultures. People often don't consider that what might be considered a heroic act in one culture, doesn't necessarily count as a heroic act in another culture.
Answer:
I would say We don't have enough evidence or Cell theory is still changing.
Explanation:
There are so many cells in everything so it's almost impossible to know exactly what is going on. Theories about cells have been going on for over 500 years, and we still don't know exactly what is what.
So the answer a will be correct ohoh
Salt concentration is the factor among the following factors given in the question that does not vary between a fast flowing river and a pond that receives no water input. The correct option among all the options that are given in the question is the second option. I hope the answer comes to your help.