I think the answer is D. A good indicator is the resting heart rate. Exercise strengthen your heart and it makes it more efficient. The resting heart rate shows of the heart is pumping blood normally each time it contracts. Having a normal resting heart rate would mean a healthy heart.
Hey there!
I think it's 2 & 3. Maybe 4 too
Hope this helps!
Always remember, you are a Work Of Art!
- Nicole <3 :)
Plants and animals provide food for humans. Plants cycle the air for humans too.
Answer: Carbon is one of the essential gases in nature,couple of natural processes causes the release of carbon. Some of the processes include;
- When the remains of producers are broken down by decomposers in the ecosystem.
- When animals break down food molecules to obtain energy, carbon is released.
- When the remains of consumers in the ecosystem are broken down by soil decomposers, carbon is released.