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Answer:
Studying hours.
Explanation:
Studying hours should the third variable that correlates the other two. Since that higher self-esteem should motivate students to study more, and that hours are going to get higher grades. So, depending on how many hours they dedicate to study, grades are going to raise, it's like a cycle in this case.
Answer:
Generators are based on the connection between magnetism, motion and electricity. Generators typically use an electromagnet, which is created by electricity and a rapidly spinning turbine to produce massive amounts of current. ... When the magnet spins, it induces a tiny current in each part of the wire coil.
Explanation:
That is the explanation:) Hope this helps if so, may I have brainliest?