Answer:
a
Explanation:
because inside a thermometer is mercury which becomes denser the hotter
Most smaller stars don't have a radiative zone. In the radiative zone, the material is hot and dense which enables thermal radiation transfers from the core outward though the Sun. This layer is size dependent therefore smaller stars might not have this zone at all.
Answer: False, providing by "fair" you mean using the scientific method and the experiment is repeatable.