I believe the biosphere is fragile, because over time all of the pollution us humans have made; If its from air pulloution, acid rain or even water pollution. the toxic acids over time have made the biosphere and the ozon layer weaker and more thin. which causes the biosphere to become weaker.
Answer: i would say the answer is D
Explanation: srry if i got it wrong
Put a end to aggressively
Answer:
i almost can see the thning
Explanation: