In adults, the function of the yellow marrow is to store adipose tissue form blood cells store calcium and phosphorus promote lengthwise growth in long bones

To solve the problem, we need to identify the primary function of yellow marrow in adults. Let's analyze the options provided: 1. **Store adipose tissue**: Yellow marrow primarily consists of fat cells (adipocytes) and serves as a storage site for adipose tissue. 2. **Form blood cells**: This function is primarily associated with red marrow, not yellow marrow. Yellow marrow does not play a significant role in blood cell formation in adults. 3. **Store calcium and phosphorus**: While bones do store minerals like calcium and phosphorus, this is not a specific function of yellow marrow. 4. **Promote lengthwise growth in long bones**: This function is related to the growth plates (epiphyseal plates) in long bones, not yellow marrow. Based on this analysis, the correct answer is: **Store adipose tissue**. Yellow marrow's main function in adults is to store fat.