The theme tha the excerpt best reflects is tradition vs. change. Option 3 is correct. The speaker makes clear that on "these days" young people are different from what they were on another time.
The theme in a story refers to its underlying message, or idea. To put it simply, a theme is a critical belief with regard life the author attempts to express in the writing of a novel, play, short story or poem. This belief, or idea, transcends cultural barriers. It is usually universal in nature.
