The correct answer is: Cellulose.
Plants have cellulose, while animals lack it. Cellulose is a structural polysaccharide that is the main component of plant cell walls. It is a long, chain-like molecule made up of glucose units. Cellulose is not digestible by humans, but it is an important source of fiber in the diet.
Starch is a carbohydrate that is found in plants. It is made up of glucose units that are linked together in chains. Starch is a major source of energy for plants. It is also used to make bread, pasta, and other foods.
Protein is a nutrient that is found in both plants and animals. It is made up of amino acids. Proteins are essential for the growth and repair of tissues. They are also involved in many other bodily functions, such as digestion, metabolism, and immunity.
Fat is a nutrient that is found in both plants and animals. It is made up of fatty acids. Fat is a source of energy and it also helps to absorb vitamins. Fat is also important for the health of the skin, hair, and nails.
In conclusion, the correct answer to the question “Plant have ____ while animals lack it” is Cellulose.