I'm not sure, I think it's option A.
Let me know if I'm wrong!
Objects are known to go down because of a unbalanced force
Answer:
1. Where they multiply and stimulate formation of root nodules.
2. Enlargements of plant cells and bacteria in intimate association.
Answer:
Law of multiple proportions
All three have the same current, so that is not a factor. Wattage (power) is E*I or i^2 R. The higher the resistance, the more power dissipated. The answer is R3 because it has the highest resistance.
R3 <<<< ===== answer.