Context: I also enjoy " My Utmost for His Highest " - a more famous book compiled by Oswald Chambers daughter , or " Streams in the Desert " - one of mama 's favorites , or sometimes I 'll read one of Spurgeon 's online . Kim and I took our walk as the sun was just beginning to go down . It was a perfect evening . I believe the mosquitoes have lessened quite a bit which was a welcome improvement . Yesterday was gone before I knew it .

Question: Why have the mosquitoes finally begun to lesson ?
Options:
0. The speaker has been smoking cigarettes in an attempt to repel the pesky buggers
1. The speaker has been testing a new brand of bug spray and it seems to be working
2. None of the above choices .
3. With the change of the season , the mosquitoes have begun to finally die off
Answer: 3