a concave mirror has a radius of curvature of 100.0 cm. Calculate the location and size of a 25.0 cm candle

Texture and composition are different because they are not the same aspect. texture has to do with feel and so on, where as composition is the chemical makeup which you cant touch like you can texture.

B) raising the temperature and reducing the volume of the gas.|-/ 

Gas will most likely  fill the container