2, because a theory is not a law that can not be changed, and new evidence can change a theory.
Properly identifying each species.
Accurately recording his findings.
Not interfering with ecosystem while studying the birds.
Either B and D I believe I may be wrong..
Answer:
How does the amount of water affect the growth of bean plants
Explanation:
The reason for that is because the only thing that differed in size or amount is the water. According to the question every other component, soil and amount of sunlight, are equal and the only thing not evenly distributed between the pots is the amount of water.
