Use the diagram below to answer the questions. Explain which meterstick you would use to make the more precise measurement

What is the length of the wood block using significant digits? Assume the ruler is a meterstick and the numbers are centimeters.
mm

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

the answer is na (sodium)

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.