Question

Which of the following examples can cause gene flow between populations?

Answer 1

Bird droppings that contain seeds from a different location" is the correct answer. Sometimes when seeds from different areas are ingested, the genetic material is passed on.  

Answer 2

The right answer is Bird droppings that contain seeds from a different location .

In this case, a genetic diversity will occur between the plants of this different place and the plant that will chlorinate from the seed and grow (assuming that there are no plants similar to this region). Since their gametes will mix during reproduction, this will give new species thanks to the contribution of a new gene pool.