This is known as the Columbian Exchange; option A. This includes for example Coffee and Chocolate (the plants); which are today to a great degree cultivated in a continent different than the one they originally evolved on.
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Barter does not involve money
Volcanic outgassing
Cyanobacteria banded iron formation
I think this is correct but I am not fully sure
Answer:
Mendelssohn: Symphony No. 4 IV
quick-paced dancelike theme, early Romantic era
Brahms: Symphony No. 4 IV
slow-moving theme, late Romantic era
Explanation: