Which outcome is a benefit of physical activity? management of weight
increased risk of stress
increased risk of heart attack
poor self-esteem, affecting mental health

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

multiplying and dividing the two decimals and the eqations by the same number of the overalls

i think the answer is a.keratin is the pigment responsible for skin color.