Here are 4 simple ways to say the same thing:
People live on Earth. Nature here is very amazing. Our towns and villages sit between pretty mountains and big, scary volcanoes. When pretty places and dangerous places are together, we see how great nature is.
We live on Earth, and nature is wonderful. Small towns and villages are tucked between tall, pretty mountains and hot, noisy volcanoes. The mix of lovely and dangerous things shows how powerful nature can be.
On Earth, people make their homes. Nature is full of wonders. Our homes are beside snowy mountains and loud, scary volcanoes. Beauty and danger together show how amazing nature is.
People live all over Earth, where nature is truly wonderful. Towns and little villages sit by gentle mountains and nearby fiery volcanoes. Seeing both pretty and dangerous things helps us understand how great nature is.
How I changed it (simple steps):
I used short sentences so they are easy to read.
I picked simple words like "pretty", "big", and "scary" so a 6-year-old can understand.