a variety of non-metal materials - fiberglass, styrofoam, rubber -- are thermal insulators; that is, when there is a
temperature difference across their ends, they do not transfer energy efficiently from the higher temperature end to
the lower temperature end.
will a thermal insulator generally have a low specific heat capacity (closer to sand) or a high specific heat capacity
(closer to water)?

a.) low specific heat capacity
b.) high specific heat capacity

B.) High specific heat capacity

Explanation:

Thermal insulators are materials that are bad conductors of thermal energy.

On the other hand, the specific heat capacity of a material is defined as the amount of heat needed to raise the temperature of 1 kg of the material by 1K.

So:

If a material has a low specific heat capacity, it means that it takes a short time to absorb the heat, hence a temperature increase occurs shortly. These are excellent thermal conductors.

But if a material has high specific heat capacity, it will take longer to absorb heat and is therefore an excellent thermal insulator.

object 2 because all the other ones are wrong

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.