The African continent isn't suffering from the environmental challenge "reforestation", since most of the continent hasn't suffered deforestation.
P(5) = 1/6
There are 6 sides, meaning there are 6 outcomes 1, 2, 3, 4, 5, and 6.
There is 1 outcome we want and 6 possibilities. That mean the probability of rolling a 5 is 1/6.
Hope this helps!
It means similarities between two or more things... Is that what you were looking for?