The statistical measure of 95% confidence is approximately +2 SEM. Replace the current error bars with bars that represent 95% confidence intervals (i. e., approximately 2 SEM).
Explain whether the difference between the black and red bars is statistically significant
and why.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this

a. 35°c

b. 25°c

c. 10°c

d. 40°c