Final Answer:
The function of part 1 is to provide an efficient nutrient supply.
Step-by-step explanation:
Part 1 in the diagram likely refers to a structure or system designed to deliver nutrients efficiently. Nutrients are essential substances required for the growth, development, and maintenance of organisms. In various biological contexts, structures like blood vessels, xylem, or other transport systems are responsible for providing an efficient nutrient supply.
Understanding the specific context of the diagram is essential to determine the exact nature of part 1 and the type of nutrients being supplied.