Which of the following best describes anthracite coal?

The choice that describes anthracite coal as high in carbon content and hard accurately captures its defining characteristics. Anthracite is known for being the hardest type of coal, with a carbon content that typically ranges from 86% to 97%. This high carbon concentration is what gives anthracite its significant energy content and makes it a preferred choice for heating and industrial processes.

Additionally, anthracite is often characterized by its glossy appearance, distinguishing it from other forms of coal that may have more variable textures and colors. Its hard and compact structure not only contributes to its burning efficiency but also indicates a higher energy yield compared to softer coals. This combination of high carbon content and hardness is essential when discussing the properties and applications of anthracite coal in various industries.