Final answer:
The actual material properties listed are mechanical, thermal, and electrical.
Step-by-step explanation:
The correct answer is d. Mechanical, thermal, and electrical.
These properties are actual material properties that can be observed and measured. Mechanical properties involve the behavior of materials when subjected to mechanical forces or stresses, such as strength, hardness, and elasticity. Thermal properties relate to how materials respond to changes in temperature, including thermal expansion, specific heat, and thermal conductivity. Electrical properties refer to the behavior of materials in the presence of an electric field, such as electrical conductivity and resistivity.