A group of specialized cells working together to perform a function is referred to as a tissue. Tissues are essential for various functions in the body, including movement and processing information. Therefore, the correct answer is option D, tissue.
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The correct answer to the question is that a group of specialized cells working together to perform a function is called a tissue . Tissues consist of similar cells that carry out specific tasks and are fundamental to the functioning of organs. Examples include muscle tissue and nervous tissue, each supporting different bodily functions. ;