4) Headaches can have several causes. Many people think that the major cause of head-ache is nervous tension, but there is strong evidence that suggests diet
and environmental possible factors. Some people get headaches because they
are dependent on caffeine. Other people may be allergic to salt, or they may
have low blood sugar. Still, other people are allergic to household chemicals
including polishes, waxes, bug killers, and paint. If they can manage to avoid
these substances, their headaches tend to go away. When a person has
recurring headaches, it is worthwhile to look for the underlying cause, especially
if the result of that search is freedom from pain. What is the text structure for
this passage?
O Cause and Effect
Problem and Solution
Chronological order
Description
Compare and Contrast