Be careful of that R/L confusion! You meant "correct", as in "right". "Collect" means "to gather together".
I agree with Melanie's corrections, but here is another way of approaching your answers:
1. People in Japan are afraid of gaining weight. They don't want to be fat. Furthermore, it's good for our health to do exercise. So they go to work by bicycle.
2. Today, we live separately from our grandparents or parents, especially in metropolitan areas. Even in the case of living with our parents, they have their meals at a different time to us. So today, a lot of families are communicating less with each other than in the past.