How is a theory different from a law? theories are factual statements, while laws can be used to make predictions. theories cannot be modified over time, while laws can be modified over time. theories are factual statements, while laws are modified over time. theories can be modified over time, while laws cannot be modified over time.

Theories can be modified over time, while laws cannot be modified over time

Explanation:

In science, we call theory what is strongly supported by various research done independently by scientists over time. It is not a mere guess, but it can be modified as different things are discovered. When a theory can no longer be modified, it is because it has become a law, a scientific fact.

Theory is no less reliable version than a law, far from it. While scientific theories explain phenomena of nature, laws are generalist descriptions of these phenomena. These are very different terms! For example, evolution is a theory. But it is not just any theory. According to German biologist Ernst mayr, evolution is a theory that has become a fact due to the immense amount of evidence that supports it. It is a fact, as is the fact that the Earth circulates around the Sun. One of its most important driving forces is the theory of natural selection.

i am going to guess that it is co2.

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.