Which of the following statements is true about natural systems

C

Explanation:

because plants have to most biomass because there are more of the.(not best explanation but biomass mean he total mass of organisms in a given area or volume.

which are(starting from top) are the levels of the energy pyramid:  

1. tertiary consumers  

2. secondary consumers  

3. primary consumers  

4.producers

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles