They are happy because there is one day that you can save the trees
Answer:
Using the present tense makes the descriptions of the setting more vivid.
Explanation: the author chose the present tense to make the narrative appear more vividly by assimilating it to the here-and-now of the speech act.
AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
In this case, combative means that they disagree, or that they argue with what 'the candidate' has to say. Make sense?