You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.
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Question: Question: Derek needs to be able to read really small print, so he reaches for a straight lens magnifying glass, which can magnify 
 Option1: more 
 Option2: less 
 Explanation: The more curved the convex lens is in a magnifying glass, the greater its ability to magnify objects.

Answer: less


Question: Question: John was viewing a patient's vital signs at the hospital. He could see clearly that the less oxygen to the cells, the pulse rate would become 
 Option1: Higher 
 Option2: Lower 
 Explanation: This causes the delivery of less oxygen to the cells, and this stimulates the heart rate via adrenalin, so that pulse rate increases in an effort to deliver enough oxygen to cells.

Answer: Higher


Question: Question: If a herd of elephants and humans are living happily in a forest and the humans then decide to move away, what happens to the elephants? 
 Option1: they decrease in number 
 Option2: they increase in number 
 Explanation: The forest habitat of elephants has also decreased in size due to humans moving in, so the numbers of the elephants have decreased.

Answer:
they increase in number