What are the context clues for word marrow?

The context clues for the word marrow are as follows:

1. The passage mentions "a thick, yellowish fluid that fills the cavities of bones." This suggests that the word marrow is related to bones.

2. The passage also mentions that "marrow produces red blood cells and white blood cells." This further supports the idea that marrow is related to bones, as bone marrow is responsible for producing blood cells.

3. The passage mentions that "marrow is a rich source of iron and vitamins." This suggests that marrow is a nutritious substance.