13 If 90 families were lost in an extinction event that lasted 10 million
years, and cach family contained 200 species, how many species were
lost every 100,000 years during that period?
F. 90
M. 200
G. 180
I. 360

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.