Problem: What are the most important words?
biotic and abiotic surroundings to which an organism must constantly adjust environment
Answer: environment, organism, surrounding

Problem: What are the most important words?
a ferry taking vehicles and passengers to town .
Answer: ferry, passenger, take

Problem: What are the most important words?
A pizza has toppings consisting of sauce, olives, and meat.
Answer:
meat, olive, pizza, sauce