Read the following short passage and complete by using logical, critical thinking and reading techniques.

The insulation materials used in buildings contain millions of air spaces, for air is a poor conductor of heat. The insulation helps keep the heat in the building during cold weather and the heat of the sun out in summer. Similarly, two pairs of light, loosely woven wool socks can better prevent body heat from escaping than one heavy, tightly woven pair because the two pairs have....