The moment it is exposed into the environment
Answer:
C
Explanation:
Not A: During April and August, photosynthetic activity was high.
Not B: The rate of photosynthesis decreased from June to December.
Not D: Photosynthetic activity increased from January through June.
C: May and June have the highest rates of activity.
Because by practicing, they control there breathe and also increase the volume of the lungs ! so , it is just practice, we can also have that type of lung by regular efforts !
The correct answer is Emigration.
Emigration is the phenomenon in which a certain amount of population migrates from a place to another place.
This leads to decrease in population as, people are moving out from a place and death rate is also high.
Reason of emigration can be social pressure, lack of resources, lack of stability, et cetera.