Why Does the fruit rise to the top?

Question

Can someone explain for my daughter, why the strawberries (and presumably other fruit does also) in a tub of strawberry yoghurt rise to the top of the container? We would like to understand the physics of it. I have noticed that the same thing happens with cans of beans and yet when making a cake, the fruit tends to sink.

Answer 1

1. maybe they add the fruits after the yoghurt in the fabrication process and thus the fruits tend to stay near the top.

2. or else the fruit has lower density than the yoghurt and will tend to rise (buoyancy) albeit slowly due to the thickness of the yoghurt.