The voice was heard clearly. (Change to Active Voice)

Choose the one-word substitution for \'One who looks on the bright side\':

Choose the correct use of \'fewer\':

Choose the correct antonym of \'Eloquent\':

Choose the correct synonym of \'Difficult\':

Read the passage: \'The Amazon rainforest produces 20% of the world\'s oxygen. Despite its importance, deforestation continues at an alarming rate, destroying approximately 10,000 square kilometers annually.\' What is the main idea?