TASK DEFINITION: Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').
PROBLEM: Potential energy is divided into ____ different types of energy.\Question: Choose the right answer from options given a) eight b) three c) zero d) two

SOLUTION: b

PROBLEM: Food waste is transformed into soil-like humus in ____ to seven days.\Question: Choose the right answer from options given a) ten b) five c) zero d) three

SOLUTION: d

PROBLEM: Penguins live on ____ different continents.\Question: Choose the right answer from options given a) seven b) zero c) four d) eight

SOLUTION:
c