In any ecosystem food chain is not operates in isolation. Different food chains are in operation at a time. The organisms of different food chains are interlinked. The network of different food chains in an ecosystem is called food web.
The top carnivores in a food web are the apex predators. They can obtain food from the primary, secondary or tertiary consumers of different food chains. They are not dependent on the consumers of one food chain.
It is, therefore, the top carnivores are the top consumers and are most likely to survive.
Rodenticide because it has the word "rodent" meaning, a mammal of the order Rodentia, which mice and rats are included in. Therefore, the answer is rodenticide.
The coil generates a stronger magnetic field. The coil generates a weaker magnetic field. The field generated by the coil has a different polarity than the field generated by the length of wire.