This is a section in a piece of writing that discusses a particular point or topic. it always begins with a new line, usually with indentation. what is the answer?

It's called a paragraph.

Explanation:

Paragraphs make up any kind of prose writing. They usually begin with an indentation and contain 4 to 10 sentences. Their length depends on the topic and on the kind of writing. In academic writing, paragraphs should discuss just one particular topic, they should be formed by a main idea and developed using key details. Those key details are ellaborated in several supporting ideas or sentences.

what is a theme?

ans: the implicit idea of a written work of literature is called a theme.

so, the only theme of "birdfoot's grampa" by joseph bruchuc is that as a human being one should always remember the value of every life on earth.

the grampa is stopping the car again and again to save those little toads from washing away in the heavy rain is an act of kindness and humanity.