Answer:
<em>T</em><em>he photograph shows</em><em> soil layers</em><em><u> </u></em><em><u>.</u></em><em><u>T</u></em><em><u>he darkest layer of the soil at the top of the photograph</u></em><em><u> is</u></em><em><u> The Horizon</u></em><em><u>.</u></em>
Explanation:
Called the A horizon, the topsoil is usually the darkest layer of the soil because it has the highest proportion of organic material.
Answer:
an independent variable is a variable that changes an a dependent variable is something that doesn't change
Explanation:
like if i put two fish is different size tanks and measured them after so long
measuring them would be dependent and putting them in different size tanks would be independent