There are four general conditions that must be met for natural selection to occur, these are: variation among organisms of the same species, large production of offspring, variation in individual fitness among members of the same species and variation in heredity. So from the question given above, the conditions that are required for natural selection are option A, B AND D.
Answer: The correct answer is: They compete with already present animals for sources of food.
Hope this helps! :)
Explanation:
D .............. im pretty sure its this one :)