Which of the following is true? a topic sentence states the main idea of the essay. the topic sentence does not need to relate to the other sentences. a topic sentence must be supported with at least two details. the topic sentence provides the supporting details of an essay.

The correct answer is A. A topic sentence states the main idea of the essay.

Explanation:

In texts including essays, ideas are usually organized by including an introduction, a set of body paragraphs and finally a conclusion paragraph that together express a global idea or thesis statement in the case of paragraphs. But besides this, each paragraph is composed of a topic sentence that expresses one main idea of the essay, then at least three supporting details that explain the topic sentence and a concluding sentence. This means, a topic sentence is always related to other sentences and details, it is supported by at least three details and also expresses one main idea of the essay. Therefore, the statement that is true is a  topic sentence states the main idea of the essay.

this is b. how railways dealt with people riding the trains without paying

eli whitney was an american inventor best known for inventing the cotton gin. this was one of the key inventions of the industrial revolution and shaped the economy of the antebellum south.