They evolved over time from older species.<span>
</span>
The correct answer should be the endocrine system.
Hormones are secreted by endocrine glands in endocrine systems. Opposite of this would be the exocrine system consisting of exocrine glands.
The answer would be the first one because yes, the sun, moon, and earth are all in alignment, meaning all the gravity from the sun and moon will pull the oceans more, making it more high or more low idk where im going with this but yeah the answer is the first one XD
Natural disasters because they are all natural