National parks can be a double-edged sword because . -the crowds of people that are attracted can disrupt the ecosystem
-it often costs too much to visit them
- the parks are not necessarily interesting
-they do not generate any revenue

is this a question? wassup

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.