Answer:
d. sewage treatment and nitrous oxide
Explanation:
From lowest to highest hierarchy it would be: planet, star, solar system, galaxy.
<span>The components of animal cells are centrioles,
cilia and flagella, endoplasmic reticulum, golgi apparatus, lysosomes,
microfilaments, microtubules, mitochondria, nucleus, peroxisomes, plasma
membrane and ribosomes. Lol I hope this is what you were looking for!</span>
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