performing a backhand shot would be the best strategy for the opponent to force the weakness.
It would all of the above. As you need all of them for a healthy body.
The answer in the space provided is anemia. It is because anemia would likely cause other people who has a type of anemia experience a craving of iron or other objects as these are symptoms associated with it. That is why the person who has iron object cravings are needed to be tested if they have some sort of anemia, in order to identify what causes him or her to do it.