19. When can we say extinction has occurred?
a. when the species' population is low
c. when the last species died
b. when the number of species is one
d. when the species is endangered
a. when the species' population is low
c. when the last species died
b. when the number of species is one
d. when the species is endangered
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Answer:
a
Explanation:
because this is a apology to what happen to OUR population