The correct answer is:
A. A group of related parts that work together to achieve a desired result.
I hope this answer was helpful!
Answer:
Coral bleaching causes and consequences
Warmer water temperatures can result in coral bleaching. When water is too warm, corals will expel the algae (zooxanthellae) living in their tissues causing the coral to turn completely white. ... Corals can survive a bleaching event, but they are under more stress and are subject to mortality.
Explanation:
The answer is in the bolded words above : )
Answer: the nucleus
Because it contains protons and neutrons whose mass is too much when compared to electrons.
Hope this helps ʕ•ᴥ•ʔ