Answer:
D) specialize cells perform specific functions in the body
Step-by-step explanation:
Specialized cells perform specific function in the body thereby increasing the efficiency. Such cells are found in complex organisms which are also known as higher animals. In such animals, many cells differentiate to form a group of cells known as tissue and perform a specific function. The cells of a tissue are very competent in performing only one type of function as compared to a cell which is not specialized and hence less efficient and have to perform all the functions rather than being specialized in just one type of work. For example, in humans which are higher organisms, nervous tissue performs the function of co-ordination, blood tissue performs the function of nutrient transport and exchange of gases but in lower organisms like unicellular bacteria all the functions are performed by just one cell.