Which is the most important part of the food web? Producers, decomposers, carnivores, or herbivores

There is an area in idaho named craters of the moon where most of the ground is covered with basalt, adark gray, igneous rock with no visibl crystals. what can you infer about the geographical history of the area?

In saturated organic compounds, all the bonds between carbon atoms are called?

How is the atomic number of a nucleus changed by alpha decay