CONCEPTS: class, locomotive, station

GEN: class locomotive on a freight train at station in the winter

CONCEPTS: grass, park, relax

GEN: group of small children relaxing in grass at the park

CONCEPTS: city, destroy, militant

GEN: a video still showed militants destroying an ancient shrine in the city .

CONCEPTS: adaptation, environment, organism

GEN:
i can explain how an adaptation helps an organism survive in a particular environment .