I think it’s D vacuoles, I’m not certain but it don’t hurt to try if it’s not that try A
I would say the answer is either A or B, the Law of Consevation of Energy states that,"<span>the total energy of an isolated system remains constant</span>" so this energy isn't destroyed, it's simply useless. When we use energy to run, our energy is released as heat, so I would assume that it is the same for other creatures. Let me know if this helps.
Answer:
It takes approximately 365.25 days for Earth to orbit the Sun — a solar year. ... But approximately every four years, February has 29 days instead of 28. So, there are 366 days in the year. This is called a leap year.