Put the sentences (a-c) in the correct order, then fill in the blank to make a logical text.

It is important to save the environment for the survival of the planet and the living beings in it. ______
a. Finally, it makes our planet a better place to live for future generations.
b. Moreover, by saving the environment, we are protecting our ecosystem and other natural resources.
c . Firstly, when we protect the environment, we are saving ourselves from the problems that will arise in the future.
d. In conclusion, it is vital to preserve and protect life on Earth.