Problem: John wanted to charge his electronic gadgets remotely. To that end, he first conducted two experiments, case A and case B. In case A he used conduction, and in case B he used induction. In both cases he used same two objects. Finally, John tried to charge his phone remotely. He called this test as case C. In case B, if one object had positive charge, what charge the newly charged object would have, positive or negative?

A: negative

Problem: David is investigating the breathing process of different organisms. He found that humans have alveoli to help them with gas exchange. He got curious about other organisms that do not have alveoli. To compare these two groups he labeled organisms with alveoli as group A and organisms without alveoli as group B. Which group most likely have greater gas exchange, group A or group B?

A: group A

Problem: Chad invested massively in railways and highways over the past decade. They also funded many IT projects and telecom infrastructure. On the other hand, Bahrain invested less, and didn't do much to improve communication pathways and technologies between different villages. Which country experiences greater distance decay effect?

A: Bahrain

Problem: In the ant world a war has been waged. Two rival groups of Acromyrmex heyeri ants, group A and group B, are battling each other to gain territory. The goal is to attack the rival group when they have more openings in their nest thatch. In battle day one group A territory had 5 C temperature. In battle day two group A territory had 22 C temperature. In battle day three group A territory had low air humidity. In battle day four group A territory had high air humidity. In which battle day group A would have less openings in their nest thatch, battle day one or battle day two?

A:
battle day one