Answer:
Levels of energy decreases as it moves through an ecosystem.
hope it helps!
A) This is still a reliable source because it clearly cites scientific research.
<em>a. Primary Treatment: solid waste settles into sludge.</em>
<em>b. Secondary Treatment: aerates water by adding oxygen to aid bacteria in the</em>
<em>b. Secondary Treatment: aerates water by adding oxygen to aid bacteria in thedecomposition process.✓</em>
c. Secondary Treatment: solid waste settles into sludge.
d. Primary Treatment: aerates water by adding oxygen to aid bacteria in the
decomposition process.