Rust is caused when there is a redox reaction of iron and oxygen in the existence of water or air moisture. For the metal to be weakened by rust, the oxygen atoms needs to be mixed with metallic atoms to form the oxygen compound.
Answer: the answer is C
Explanation: I just took the quiz
<span>Fossils that are similar which are found on different continents helps the geologists to know how the continents are connected before. The belts of the mountains proved the moving plate’s boundaries; this clearly shows the direction in which the continents are drifted. Extrapolating from this information, scientists had a rough idea of how the continents were arranged eons ago.</span>
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