I Probleme de urmărit
✓ Selectarea substanţei;
✓ Formula chimică şi denumirea ei;
✓ Starea de agregare și masa moleculară relativă;
Tipul legăturii chimice;
✓ Proprietățile substanței;
✓ Utilizarea ei.​

the answer is c.

by: nicholas dooley

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.