The answer is B. I believe that this is the answer because the barnacle is benefiting from the gray whale without harming, or affecting it in the process.
Answer:
A - Pacific plate
B - North American plate
C - African plate
D - Eurasian plate
Explanation:
Plate tectonics theory explained the plate movement and evolution from 65 million years ago which is pre cambrian era. There were seven major plates in the world such as Pacific plate, North American plate, South American plate, Eurasian plate, African plate, Indo Australian plate and Antartic plate. There were three movements in the plate such as Convergence plate boundary, divergence plate boundary and Transform plate boundary. Pacific plate is biggest plate among all.
The Mongols spread the use of gunpowder.The Mongols controlled both China and Russia.<span>Pax Mongolica encouraged trade along the Silk Road. I would honestly say these are the main effects of the Mongol incursion into Europe and Asia plus the inadvertent introduction of the bubonic plague of infected rats from Asia to Europe.</span>
Human activities directly contribute to landslides especially the kaingin system practiced by some farmers and the ruthless illegal logging for some loggers. These selfish practices harmed the nature causing soil erosion and worse landslides due to the absence of trees.
