________ are nutrients that are needed for growth and repair of the body’s tissues.

Correct answer: Proteins

Proteins are the nutrients that are needed for growth and repair of the body's tissues.

Proteins are the nutrients that are needed for the growth and repair of the body's tissues. To arrive at this answer, you may also consider the following steps:

1. Identify the nutrients mentioned in the options: carbohydrates, fats, fiber, and proteins.
2. Analyze the given definition of the nutrients required for growth and repair of body tissues.
3. Evaluate which of the nutrients from the options aligns with the definition.

Upon examining the options, proteins best align with the given definition. They are essential for the synthesis and repair of tissues, including muscles, organs, skin, and bones.