15be specific or how do plants and area become suitable for other living organisms including plants?

Depending on the plant, different organisms can create different ecosystems based off multiple versions of that plant. Also, depending on what the plant is, (peanuts are a good example) they can help the soil and make it richer. vegetable plants, if the veggie falls off and rots, it can help and add to the minerals in the soil and work as a natural fertilizer. So Ecosystems, organisms that can help to make other plants, and rich soil. Hope this helps!

This is what i did 45-5=4040÷4=10so there are 10 white marbles but am not sure is just a question that am not sure

Wikipedia aswell can be used to solve the following questions