The answer is "Experimental research".
Experimental research refers to any research led with a scientific approach, where an arrangement of variables are kept steady while the other arrangement of factors are being estimated as the subject of test.
The most straightforward case of an experimental research is leading a laboratory test. For whatever length of time that examination is being directed under logically satisfactory conditions – it qualifies as a trial explore. A genuine experimental research is thought to be fruitful just when the scientist affirms that an adjustment in the dependent variable is exclusively because of the control of the independent variable.
Answer / Explanation:
It is to be noted that the earth can be broken down into three climate zones which are polar, temperate and tropical climate zones. The main mover of a climate zone is the amount and direct sunlight that reaches the Earth's surface. In the tropical regions, there is a fairly constant amount of sunlight throughout the year.
Thus, a zone that is closer to the equator will continuously receive a lot of direct sunlight and such a place will have a warm climate.
<span>b: New England and Middle</span>
