Problem: What are the most important words?
clouds and trees reflected in a still lake
Answer: cloud, lake, reflect, tree

Problem: What are the most important words?
a vitamin is an organic compound required as a nutrient in tiny amounts by an organism
Answer: compound, organism, require

Problem: What are the most important words?
A platter of fresh oranges, bananas, and cantaloupe arranged in a spiral.
Answer:
arrange, banana, orange