In simple terms, chlorophyll makes a leaf look green because it reflects only green light.
Answering in a more detailed fashion, chlorophyll is a pigment. As a pigment it absorbs some wavelengths of visible light, (red, orange, yellow, green, blue, indigo, and violet are the colors of visible light), while reflecting others. In specific, chlorophyll absorbs all other colors of light but green, which it reflects. It is this reflection of green light that cause a leaf to appear green.
I know that question #4 is B.) Sun
<h3>Consequences of soil erosion</h3>
Soil erosion decreases agricultural productivity, degrades ecosystem functions, amplifies hydrogeological risk such as landslides or floods, causes significant losses in biodiversity, damage to urban infrastructure and, in severe cases, leads to displacement of human populations.
<span>In 1911, British explorer Robert Scott and his party died on their return trip from the South Pole. Scott arrived in the </span>South Pole<span> on 17 January 1912, just five weeks after </span>Roald Amundsen<span>'s </span>Norwegian expedition<span>. On their return journey, Scott's party managed to prove that </span><span>Antarctica was once forested and joined to other continents by discovering several fossil plants. He died in 1912 alongside with his party.</span>
<span>Answer:
Mercosur try to improve trade in South America by expanding trade, improve transportation, and reduce tariffs among member countries.</span>
