Answer:
Electromagnet
Explanation:
Magnets are categorized by their source of magnetism. Temporary magnets become magnetized in the presence of a magnetic field.
A. They became sick. Hence, the Koch hypothesis.
A predator, prey, carnivore
Answer:
C. Active transport
Explanation:
Active transport is the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
The rest of these options do not require energy because they are passive.