D. living things as a reservoir
Answer:
Shutting down factories that discharge materials to the rivers.
The largest sum of US pollution currently caused by factory-related substance
Explanation:
my pfp!
<em>Hardness is a measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied</em> <em>Macroscopic hardness is generally characterized by</em> <em>strong intermolecular bonds</em>, <em>but the behavior of solid materials under force is complex; therefore,</em> <em>there are different measurements of hardness</em>: <em>scratch hardness, indentation hardness, and rebound hardness. Hardness is dependent on ductility, elastic stiffness, plasticity, strain, strength, toughness, viscoelasticity, and viscosity. Common examples of hard matter are ceramics, concrete, certain metals, and super hard materials, which can be contrasted with soft matter.</em>
First blank space is endocrine system and the second blank is hormones
Answer:
The color of the light changed
Explanation:
Correct on edge
