List 2 reason after establishing OPEC made the prices go down

Match the graph type to its description. 1. uses symbols to describe information pie 2. compares different quantities at the same point in time line 3. compares increases and decreases in a quantity over a period of time bar 4. shows the relationship of parts to each other and to the whole pictograph

What is the amount of organic matter in all living organisms in a habitat called?

What are the answers for the following questions?