3) add information that further explains or defines the main idea.
Extension mean to add on to, so 3) is the correct answer.
Answer:
The magnetic force only acts perpendicular to the direction of motion, which means the charge can never speed up. Such a force can only change the direction of motion.
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Explanation:
John Wycliffe was the person who questioned the rightful extent of the Pope's religious authority.
Heat and pressure change lots of characteristics. It can cause the color to be darker than the original shade.