A species that is not native to an ecosystem but is introduced artificially. Usually cause harm to the native species in the area.
I think the answer you are looking for is that the stomach is the fourth level of organization.
1)Respiration
2)Both
3)Respiration
4)Respiration
5)Respiration
6)Photosynthesis
7)Respiration
8)Photosynthesis
9)Photosynthesis
10)Respiration
11)Photosynthesis
12)Photosynthesis
13)Photosynthesis
14)Respiration
15)Respiration
16)Photosynthesis
