どの季節が一番好き?
Which season do you like the best?

 夏!
Summer!

 どうして?
Why is that?

 だって花火できるもん。ママは?
Because I can play with fireworks. How about you, mommy?

 ママは冬が一番好き!
I like winter (the) best.

 どうして?
How come?

 だって暑いの嫌いなんだもん!
Because I hate [can't stand] hot weather!

 それじゃ、どの季節が一番嫌い?
Then which season do you hate the most?

 東京はここより暖かいし、おいしいレストランもたくさんあるわ。
Tokyo is warmer than here, and there are a lot of good restaurants, too.