PLS I NEED HELP What function does PERT replace?

A) It serves as coenzyme and raises the activation energy

B) It serves as catalyst and lowers the activation energy.

C) It serves as a product and lowers the activation energy.

D) It serves as a reactant and is consumed in the reaction.

one would be wind another would be water density

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

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.