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.

Question: When we are trying to move through the thermosphere the lower we go the _____ it will feel 
 Option1: colder 
 Option2: warmer 
 Explanation: In the thermosphere, temperatures increase as altitude increases.
colder

Question: Clark is 55. Morgan is 25. A scientist is researching which of these two men is more likely to develop cardiovascular disease. If their ages is the only piece of info that the scientist has, then he would say _____ is more at risk for cardiovascular disease. 
 Option1: Clark 
 Option2: Morgan 
 Explanation: Older age, male gender, and a family history of cardiovascular disease all increase the risk of developing cardiovascular diseases and cant be controlled.
Clark

Question: Ian sees an object with few colliding particles, and he compares it to another object with few colliding particles. Which is true about the objects? 
 Option1: the object with many colliding particles has a lower concentration of particles 
 Option2: the object with many colliding particles has a higher concentration of particles 
 Explanation: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.

the object with many colliding particles has a lower concentration of particles