Helppp The graph shows the change in concentrations of EPA-monitored air pollutants over time. Which pollutant has decreased the most inconcentration since the EPA started monitoring?

A NO2
B Ozone
C Lead
D PM 10

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

the glands which are associated with each description is given below: