1 Subjects: “...natural forests...”

2 Subjects: “...natural selection...”

3 Subjects: “...natural rubber...”

4 Subjects: “...natural rubber...”

5 Subjects: “...natural rubber...”

6 “... lives. However, from an environmental point of view, they consume a huge amount of natural resources...”

7 “... lives. However, from an environmental point of view, they consume a huge amount of natural resources...”

8 “... lives. However, from an environmental point of view, they consume a huge amount of natural resources...”