A. arteries and veins.
Just as tubes within the stems and leaves of plants transport water, arteries and veins within animals transport blood with the required nutrients for our bodies.
We can learn the beliefs and practices of people in the community by community immersion or we will live in there community to observe and interact with the people (participant observation). Doing an initial community diagnosis will identify the most significant health problem in the community. Doing a participatory action research will also make us understand disease in the community.
I am not sure , but the number of light colored should be less , because the forest is polluted and light colored will be more visible. Do they want numbers?