i am going to take a stab at this
They require energy to live
Answer:
star
Explanation:
For a brief time, a supernova can shine as brightly as an entire galaxy, but will fade again over a matter of days. The explosion occurs when a high-mass star finally runs out of nuclear fuel. ... The resulting shock wave creates an expanding shell of gas and dust called a supernova remnant.
Hello! The correct answer would be D. Cnidarians. :)
-Cheerio, and have a nice day!
Warm Front would be your answer
Answer:
no
Explanation:
a compound has 2 or more substances.and can be broken down.
a pure substance can't be broken down any further