Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

Sedimentary rock

Explanation:

The Coquina rock is a sedimentary rock that is comprised of broken fragments of the shells of ancient trilobites, invertebrates, and brachiopods. When the sediments were deposited, and shells were also added on it, they have undergone compaction and lithification, as a result of which these rocks were formed. They are generally classified as the soft limestone rocks, that are typically formed in the marine and lacustrine environments, where the flow energy is very high.

Thus, Coquina is a sedimentary limestone rock.

the answer would be knowledge about cars!

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.