I think that it is softer than a diamond. As we all, a diamond is considered the hardest mineral and cannot be scratched by any kind penny.
The answer is A which is CH4.
Predators have to eat. If things are good in an eco-system then the prey is eating good which means the predators can eat good also. Starvation means that things in the eco-system are going bad. Also, It helps the earth maintain its balance. If too much of any aspect of the system is removed it throws the whole thing off balance. too many herbivores will eat too much vegetation.
