WILL GIVE BRAINLIEST!! 1. What is mutualism?

2. What is commensalism?

3. What is parasitism?

4. What is symbiosis?

Mutualism- The doctrine that mutual dependence is necessary to social well-being.

Commensalism- An association between two organisms in which one benefits and the other derives neither benefit nor harm.

Parasitism- Where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life.

Symbiosis- Symbiosis is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.