Final answer:
In English grammar, geographical names like cities, states, and countries are always capitalized, and nonessential information is enclosed in parentheses.
Step-by-step explanation:
In accordance with the rules of capitalization in English grammar, one must capitalize the names of specific geographical entities including cities, counties, states, countries, landmasses, mountains, and bodies of water. This rule helps to distinguish these proper nouns from generic terms and aids clarity in writing. For example, capitalizing "Mississippi River" clarifies that you are referring to the specific river in the United States, not a generic river or state.
It is also important to use parentheses to enclose nonessential information such as explanations, asides, examples, and dates without altering the main sentence's meaning. For instance, 'Mount Everest (the highest peak in the world) is located on the border between Nepal and Tibet.'