Question

1. what is the main idea of the text?

a. scientists want to find out more about why certain foods cause brain freezes more than others.
b. brain freezes are short, painful headaches caused by a sudden temperature change in your throat.
c. the problems caused by a brain freeze can harm your whole body, so be careful when eating ice cream.
d. it is not possible to stop a brain freeze from happening, but many people have learned to live with them.

Explanation:

To find the main - idea, we need to summarize the overall content of the text. Option A focuses on a specific research aspect about brain freezes. Option C over - states the harm of brain freezes. Option D is not likely to be the main idea as it just mentions living with brain freezes. Option B gives a general and basic definition of brain freezes which is likely to be the main idea if the text is introducing what brain freezes are.

Answer:

B. Brain freezes are short, painful headaches caused by a sudden temperature change in your throat.