Step-by-step explanation:
Hypothesis: If the type of food available changes, then the frequency of different types of bird beaks will change, because birds with beaks better suited for the available food will have a higher chance of survival and reproduction.
This hypothesis is based on the principle of natural selection, which states that the individuals in a population that are better adapted to their environment have a higher chance of survival and reproduction, passing on their advantageous traits to their offspring. In the case of the bird beaks, different beak shapes and sizes are better suited for different types of food. For example, a thin, pointed beak is better for catching insects, while a thicker, more robust beak is better for cracking seeds.
If the type of food available changes, such as a change in the abundance of insects or seeds, then the birds with beaks better suited for the new food source will have a higher chance of survival and reproduction. Over time, this can lead to a shift in the frequency of different types of bird beaks within the population, as the advantageous beak types become more common.