D. Made of ash and pieces of rock rich in silica.
Should be your answer!
Answer and Explanation:
The lymph node are the sites for the formation of lymphocytes and monocytes. These are concerned with antibody formation and phagocytosis of foreign materials respectively. In the lymph nodes, bacteria and other harmful materials are removed from lymph.
I believe these are the answers:) best of luck!
It keeps the water in the plant, so it keeps the water from evaporating and killing the plant
