What property of asbestos makes it an effective insulator?

Asbestos is known for its effectiveness as an insulator due to several key properties it possesses. The property that particularly makes asbestos an effective insulator is its resistance to heat. Asbestos can withstand high temperatures without degrading, which makes it suitable for use in applications requiring thermal insulation, such as in building materials and electrical insulation.

Additionally, asbestos has high tensile strength, which contributes to its durability and ability to maintain its structural integrity in demanding conditions. This strength allows it to be used in various construction materials where resilience is essential.

Another critical aspect is its inability to conduct electricity, which makes it safe for use in electrical insulation applications. This property helps prevent electrical accidents and ensures safety in environments where electrical currents are present.

Therefore, taking into account that all these properties (high tensile strength, resistance to heat, and inability to conduct electricity) contribute to the isolating capabilities of asbestos, the most comprehensive answer is indeed that all of the listed properties contribute to its effectiveness as an insulator. Thus, the choice that encompasses all these characteristics is the correct one.