Which statement about the amur river is accurate

What season is it in the southern hemisphere when it’s december? a) fall b) spring c) winter d) summer

Why are fossils of organism's from the phanerozoic eon much more likely to be found than fossils of organisms from any other eon? a. more organisms present during the phanerozoic eon had soft body parts. b. organisms present during the phanerozoic eon were all microscopic. c. more organisms present during the phanerozoic eon had hard body parts. d. organisms present during the phanerozoic eon are the most ancient life forms.

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4