Which statement belongs in the region marked X?
A) occurs only in cases of volcanic activity
B)changes occur gradually
C) begins when lichens populate an area
D)results in a reduction of the number of species

isajfeidjseniewwkdfke yahya is the berds is dsa; f

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

hope this ! : )

basically means the stoc market is going down since   dow is one of the most sucessful buiness it would be a tragedy for it to go down and it ensures the ruinty of the stock market