Why are photosynthetic organisms, such as plants, so important to life on earth

Explanation:

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They filter out carbon dioxide, a greenhouse gas, and they produce oxygen as a by-product of photosynthesis. Of course, oxygen is crucial for essential life processes such as cellular respiration.

answer; polycythemia is the correct answer;

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !