Which is not a major component of natural gas

Natural gas refers to the mixture of gaseous hydrocarbons which are used as fuel. The major component of natural gas is methane. The other components of natural gas are ethane, propane, nitrogen, carbon dioxide, hydrogen-sulphide and trace amount of water.
Natural gas does not contain CARBON MONOXIDE. 

The answer to this is b

The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process.