An abiotic factor that varies signfiicantly between people and has strong influence on the gutmicrobiome is _

The development and alteration of the gut microbiome are affected by a variety of factors including birthing and infant feeding method, exposure to stress, environment, diet, medications, stage of lifecycle, and comorbid diseases (Fig. 4.2).

Explanation:

there really is life in the deepest part

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.