What are template literals in JavaScript?

Template literals in JavaScript are a powerful feature that enhance string manipulation. They are defined by using backticks (``) instead of single quotes or double quotes, which brings several advantages.

One of the main characteristics of template literals is that they allow embedded expressions. This means you can include variables and expressions directly within the string using the ${expression} syntax. For example, if you have a variable called name, you can create a greeting message like this: `Hello, ${name}!`. This capability makes it much easier and cleaner to construct strings dynamically compared to traditional string concatenation.

In addition to embedded expressions, template literals support multiline strings, enabling developers to write strings that span multiple lines without the need for concatenation operators or newline characters. For instance, writing:

const message = `This is line one.
This is line two.`;

will correctly create a string that includes both lines without any additional code.

Given these features, both the ability to embed expressions and the convenience of handling multiline strings make option D the most comprehensive and accurate description of template literals in JavaScript.