In this project, you will design, construct, test, and modify a device that releases thermal energy by chemical processes. You will be provided specific materials by your instructor, and will use these materials to design a device that releases energy to the environment. Next, you will build the device and test it by gathering temperature data. Finally, you will use your data to evaluate the design and decide how to improve your device

the answer to your question is c.

if you read the house of usher you should know that the house was haunted

answer: mercury

explanation:

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.