Which of the following countries are parliamentary democracies?
a.
russia and the united kingdom
b.
denmark and germany
c.
portugal and the czech republic
d.
norway and sweden

5. what is a red giant? can our sun become a red giant? why or why not?

From the standpoint of geography,a is an internal rendering of an individual's known world

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed