Plants respond to which of the following external factors?

The main difference between living and non-living things is:

Select the correct option from the following:

Which of the following $statement(s)$ is/are correct?
$(i)$ All living organisms have the ability to respond to environmental stimuli which could be physical,chemical,or biological.
$(ii)$ Plants respond to external factors like light,water,temperature,other organisms,pollutants,etc.
$(iii)$ Photoperiod affects the process of reproduction.
$(iv)$ Human being is the only organism who has self-consciousness.

The first step of taxonomy is ....

Which one of the following statements refers to Reductionist Biology?