Hope this helps!!!
1. Parasite
2.commensalism/parasite
3.commensalism
4. Parasite
5.commensalism
6.commensalism
7. Mutualism
The correct answer is C- androecium.
Performance of physical activity, intake of food and water, body temperature, illnesses or diseases, etc.
That should be the spinal cord which rests inside the spinal vertebra.