This character is competitive, flirtatious and self-centered, even more so than most of the other characters.

Jack
Algernon
Gwendolen
Cecily
Lady Bracknell

say the correct answer and explain why

The correct answer is Algernon.

To determine the correct answer, we can analyze the given traits of the character—competitive, flirtatious, and self-centered—and compare them to the descriptions of each option.

Looking at Jack, also known as Ernest, we see that he is primarily portrayed as responsible, honest, and serious about his social and family obligations. While he may have some competitiveness, he is not typically depicted as flirtatious or self-centered.

Gwendolen is more focused on romance and marriage, rather than being overtly competitive. While she may flirt with Jack and has her moments of self-centeredness, she is not typically portrayed as being more so than most other characters.

Cecily, like Gwendolen, is primarily concerned with her romantic fantasies and personal pursuits. She may exhibit some self-centeredness, particularly when it comes to her love interest, but is not consistently depicted as being highly competitive or flirtatious.

Lady Bracknell, the imposing matriarch, is certainly self-centered and domineering, but she does not exhibit the traits of being competitive or flirtatious.

This leaves us with Algernon. Throughout the play, Algernon Moncrieff is portrayed as highly competitive, especially with his rival Jack. He often engages in playful banter and teasing, displaying his flirtatious nature. In addition, Algernon is portrayed as quite self-centered, often seeking his own pleasure and disregarding the feelings and wishes of others. For these reasons, Algernon is the correct answer.