I need help with science

1. The difference between passive and active transport is passive transport is when a place is not busy, and people are just passing around. Active transport however, is people are rushing, shoving, each other around, and where a place is really busy and wild.

2. Active transport: energy needed: yes; structures involved: airports, buildings; examples; people on a train or squashed space.

Passive transport: energy needed: no; structures involved: suburbs, sidewalks; examples: people walking on a sidewalk on open space.

Explanation:

if you mean hydrogen and oxygen then water is the product