Which of the following steps is an important part of the process by which ecology guides human to a sustainable future?

The following steps are an important part of the process by which ecology guides human to a sustainable future. The definition of the word "sustainable" is that the element that is sustainable has the capacity to endure. In other words, humans need to take care of the natural world and all the natural resources in order to be able to continue living on this earth. In order to increase the sustainability of the ecology, we need to lesson our carbon footprint on the earth. We can do this by creating ecologically friendly living spaces, "green offices", and change our lifestyles to conserve natural resources.