Apopulation of pigs lives on an island together with burrowing termites pigs that have the longest snouts tend to survive better over time most of the pig population is made up of individuation is made up of individuals that have very long snouts this is an example of which type of selection

The correct answer is the directional selection.  

Directional selection in population genetics refers to a method of natural selection in which an extreme phenotype is preferred over other phenotypes, making the allele frequency to curve with time towards the direction of that phenotype.  

Under directional selection, the beneficial allele enhances as an outcome of the distinctions in the reproduction and survival between the different phenotypes. The upsurges are not dependent upon the dominance of the allele, and even if the allele is recessive, it will ultimately become fixed.  

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.