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Why do I get songs stuck in my head?

Earworm songs seem to get stuck in a certain area of your brain responsible for music memory. The types of songs that become earworms 19.___________(BE) personal, but they have some common features. They tend to be faster songs, with common structures and beats. You have probably heard the earworm recently or have heard it a lot. An earworm can apparently only be stopped by activating the same music memory part of the brain. Reading, thinking about words or pictures, physical activity, and talking don't stop it. To stop an earworm, try 20.___________(LISTEN) to a song you don't find catchy.

What makes you crave certain foods?

Although evolution has hard-wired us to favour salty, sweet, and oily foods because they're rare in nature and provide a calorie or vital mineral boost, most common food cravings today have an emotional root. You might 21.___________(GIVE) a boiled sweet as a reward as a child. The same feeling of 22.___________(REWARD) when you unwrap that sweet can carry into your adulthood. 23.___________(THIS) deep-seated psychological responses are subtle, but powerful, and can compel you to seek the same boiled sweet out time and time again. You might think that the crunch and the sweetness or flavour is all you crave, but the feelings play 24.___________(THEY) part as well.

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