An energy-producing organelle found in nearly all cells of plants and animals.

Mitochondria

Explanation:

Mitochondria is and energy kinda like a battery and cells have thousands of mitochondria. Hope this helps :)

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.