Why is it helpful to focus on a problem to help you find a topic

Magnesium is the fourth most abundant mineral in the body and is essential to good health. magnesium is needed for more than 300 biochemical reactions in the body. it maintain normal muscle and nerve function, keep bones strong, keep one’s heart rhythm steady, and supports a healthy immune system. magnesium also regulate blood sugar levels, promotes normal blood pressure, and may play a role in energy metabolism and protein synthesis. doctors and scientists are trying to determine whether magnesium may play a role in preventing and managing disorders such as hypertension, cardiovascular disease, and diabetes. which is the main idea of this paragraph? a. the role of magnesium in human nutrition is being studied intensely. b. magnesium may be related to the body’s metabolism and other healthy functions. c. magnesium appears to contribute to hypertension, cardiovascular disease, and diabetes. d. magnesium and a healthy immune system are separate diseases.

What would be an example of foreshadowing in a story about a magician who ends up going bad from too much power? a. the author shows the magician preparing his tricks before a show. b. the narrator describes the magician's rise in popularity at the beginning of the story. c. the reader is first introduced to the magician having fun scaring audiences with his tricks. d. the story begins on a cold autumn day in the suburbs of a big city

In chapter 32 what happens to huck that calls attention to his presence on the little farm