I'm not quiet sure what this is asking but this is appears to be related to cover letters, if that helps.
Answer:
<em>A hypothesis is a testable, scientific statement</em> based upon limited evidence as a starting point in order for further investigation.
I assume when you ask <em>during which steps is it important</em> you mean the steps of the scientific method. Although it is important throughout the entire process, the most important would probably making a prediction. You cannot make a (good) prediction without a hypothesis. And without a prediction, you cannot test anything at all. You can't form a conclusion of any sorts.
So I would say it is most important when trying to form a prediction based on your hypothesis.
If a bar of copper is brought near a magnet, the copper bar will be repelled by the magnet (B). Copper itself is not magnetic, but it sets up electric currents when a magnet is brought close to a bar of copper. These electric eddy currents push the magnet away from the copper bar. Magnetism and electricity are related and the interaction between the copper and a magnet is used in power plants to generate the electricity that we use every day.
The correct answer is B. Section Headings.
*Hope this helps!