TASK DEFINITION: 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.
PROBLEM: Question: What would happen to the speed of Earth's orbit if our planet were to move closer to the Sun? 
 Option1: increased speed 
 Option2: decreased speed 
 Explanation: The Earth travels faster in its elliptical orbit when it is closer to the Sun than when it is farther away.

SOLUTION: increased speed

PROBLEM: Question: When a rabbit farmer begins a farm he starts with many rabbits. If the rabbits are not cared for and fed does the population 
 Option1: decrease 
 Option2: increase 
 Explanation: With exponential growth, the population starts out growing slowly. As population size increases, the growth rate also increases.

SOLUTION: decrease

PROBLEM: Question: If the speed of a stream decreases, the size of the particles carried in that stream 
 Option1: increase 
 Option2: decrease 
 Explanation: In erosion, a slower moving stream will only carry smaller particles.

SOLUTION:
decrease