Plz and

what occurs in both solar and lunar total eclipses?

a. one celestial body passes through the umbra of another.

b. a corona is produced when one celestial body passes in front of another.

c. one celestial body passes through the penumbra of another.

d. they occur only during the full moon phase of the lunar cycle.

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.