Ecotone is the transition zone between 2 communities, habitats e.g., forest and grassland. The increased number of species in the region of ecotone is called as edge effect and the species is called as edge species.
Bottleneck effect is described as a phenomenon when the population of a species is reduced to a drastic level and genetic diversity also becomes limited. It generally takes place after overhunting or earthquakes etc.
Warburg effect is the formation of lactic acid from glucose via glycolysis in the cancerous cell even when an adequate amount of oxygen is available.
Pasteur effect is the inhibition of the process of fermentation by supplying oxygen.
Thus, the correct answer is option B.