It is called as conservation biology. Conservation biology
aims to protect species, their habitats and the ecosystem from extinction. It is
one field of ecology that focuses on the environmental problems caused by
humans. It aims to reverse and understand the cause of loss of biodiversity.
Environmental science refers to an interdisciplinary field in academics, which incorporates biological, physical, and information sciences to the study of the environment, and the answer to environmental issues.
Some of the components of environmental science are environmental chemistry, atmospheric science, geosciences, forestry, and agricultural sciences, and oceanography and marine sciences.
The biological interactions refer to the associations between distinct species in an environment. In a natural world, none of the species is cut off from its environment, organisms are a component of their environment that is rich in non-living and living elements, which interact with each other in a certain manner.
The associations of an organism with its surroundings are essential to its survival, and the functioning of the ecosystem as a whole.
Can’t see diagram so can’t help sorry man
In veins blood flows from the body to the heart . veins carry deoxygenated blood. Most of our blood volume is carried in the veins (64%). Veins can expand to hold large amounts of blood. Veins are blood vessels that carry blood from the body back to the heart.