Explain how at least two of Earth’s systems interact to form soil.

1. spheres are closely connected. For example, many birds (biosphere) fly through the air (atmosphere), while water (hydrosphere) often flows through the soil (lithosphere). ... Interactions also occur among the spheres; for example, a change in the atmosphere can cause a change in the hydrosphere, and vice versa. 2. Although soil only accounts for about 10% of Earth's surface, it is a precious natural resource that deeply affects every other part of the ecosystem. Soils hold nutrients and water for plants and animals, filter and cleanse water, and affect the amount of water that returns to the atmosphere to form rain. 3. The atmosphere brings back rainwater to the hydrosphere. ... The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion. The geosphere, in turn, reflects the sun's energy back into the atmosphere. The biosphere receives gases, heat, and sunlight (energy) from the atmosphere.

Explanation:

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

i think its 100.

hope this !