Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 31 to 35. Scientists have researched the effects our diet has on our mental health. They say what we eat affects and changes our brain up until the age of 30. This explains why older adults are more emotionally stable than under-30s. The research team was led by a professor of health and wellness studies. She said that people knew of the link ...

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 31 to 35.

Scientists have researched the effects our diet has on our mental health. They say what we eat affects and changes our brain up until the age of 30. This explains why older adults are more emotionally stable than under-30s. The research team was led by a professor of health and wellness studies. She said that people knew of the link between our diet and diabetes, heart disease and obesity, but we don't know so much about the influence our diet has on mental health. The researchers suggested that mental well-being led to healthy eating, healthy practices, and exercising.

The research was carried out anonymously via an Internet survey. It was sent to different professional and social networks. The study found that adults under 30 who ate fast food more than three times a week had higher levels of distress, anxiety and depression. For adults over 30, the study found that eating less carbohydrates and more fruit reduced these conditions. The researchers pointed to research showing how a Mediterranean diet was as good for our brain as for our body. They said: "It has all the components that are important for the healthy structure of the brain."

( Source from breaking news english)

The passage is mainly about_______?