Answer:
it is important to choose skin care products based on skin type because
1. you'll be wasting money on stuff not for your skin type
2. products not for your skin type may not work
3. you may have a bad reaction to products that aren't for your skin type
There are many factors in weight training but most commonly you will gain muscular strength and appearance.
Stretching increases flexibility, sit-ups are for abdominal endurance, and distance running are for leg muscle endurance, so the correct answer is pull ups.