Which geochemical cycle involves mantle convection?

The rock cycle ( including the plate tectonic movement)

Explanation:

The geochemical cycle refers to the transportation of chemical elements from the subsurface region to the surface of the earth. This cyclic process is controlled by the geological and chemical factors.

The rock cycle is one of the type of geochemical cycle which involves the convection current in the mantle.

The earth's crust is comprised of lithospheric plates and the rocks that are present here are made up of numerous chemical elements such as Carbon, Phosphorous, and many more. These plates move over the viscous asthenosphere layer due to the convection current that generates in the mantle. It is due to the radiation of heat energy from the interior of the earth. These plates when moves, share a convergent, divergent and a transform type of plate boundary. As a result of which these chemical elements are also transported along with these plates.

In a convergent plate boundary the denser plate subducts carrying its chemical elements and in a divergent plate boundary, the deep seated rocks with various chemical constituents are carried to the surface forming new crust.

Thus, the rocky cycle plays an important role in carrying the chemical elements by the process of plate motion that generates in the mantle due to the convection current.

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.