Increase to the visible part
Answer: they used seasonal wind, temperature changes, they also used the flooding of rivers. all these are used to tell time
Explanation: the seasons change the climate of the area
Answer:
40,000
Explanation:
200x 200=40000
I'm pretty sure that's the answer
I think the correct answer would be the last option. A kind of variable that a researcher purposely changes in an investigation is the independent variable. It is the value that does not depend to any change in any variable involved. Instead, it is the one that affects the other variable called the dependent variable. The dependent variable is the variable that is being tested or studied. Also, along with these two there are variables that are held equal all through out the research. These are called the constants. These constants are factors that might affect the dependent variable that is why they are held constant to prevent more errors.
