A is your answer, hope that helps
Answer:
Light therapy—or phototherapy, classically referred to as heliotherapy—consists either of exposure to daylight or some equivalent form of light as a treatment for seasonal affective disorder, or exposure of the skin to specific wavelengths of light using polychromatic polarised light to treat a skin conditioncondition
I think it is helpful to you
Even though the sentence looks fine, in order to make it more correct you should avoid using a subordinate clause as predicate nominative.
So, instead of saying The climax of the event was when we ordered pizza, it may be better to say The climax of the event was ordering pizza.
Explanation:
Occasion-The speech was delivered on November 19,1863 after the Battle of Gettysburg
Audience-The speech addressed all the citizens of the U.S
Subject-The bravery of the union soldiers who died at the Battle of Gettysburg was the speech topic.
Speaker- The speech was delivered by Abraham Lincoln.
Purpose-The speech was part of a ceremony to honor soldiers who died at the Battle of Gettysburg.
