As trees along a heavily shaded stream are cut down for farm land, the environmental protection agency (epa) must measure changes to the local stream habitat. water samples from the stream are collected over time. the microorganisms are counted and classified in order to track changes.
epa researchers most likely used a to view the microorganisms in the stream water samples.
a)
light microscope
b)
magnifying glass
c)
computer simulation
d)
scanning electron microscope

A)light microscope

Explanation:The EPA researchers would use a light microscope to count and classify the microorganisms present in the stream water samples. A magnifying glass would not be strong enough; a scanning electron microscope would be too powerful. A computer simulation does not analyze real data.

i believe you meant to say air rather than hair so the answer is below ")

the dead sea, the lowest place on earth at 430 metres (1,410 ft) below sea level, has a correspondingly high typical atmospheric pressure of 1065 hpa.

answer; 60-100; beats per minute