Which type of star has the coolest surface temperatures?

A. neutron

B. red giant

C. white dwarf

D. main sequence

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

As you watch a surfer ride a wave towards the shoreline, what is the shoreline? a) displacement reference b) reference point c) coordinate plane d) cartesian boundary

Can someone me with 3 and 4 plz. this is for masteries test.