Answer:
The correct option is B) To help people prepare for the future.
Step-by-step explanation:
The other three options are irrelevant to scientific research on environment .
Hence the correct option is B)
62.84
pie=3.142
c=pie * diameter
r=10cm
d=2r
d=2(10)=20cm
c=3.142 * 20
c=62.84
In short, Your Answer would be Option D) 25
Hope this helps!