The answer is friction. Friction is a force that causes moving objects to slow. Imagine you are trying to slide across a carpet. You can not slide across a carpet because of friction.
Answer:
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Explanation:
A pond is a standing water and a river is a flowing water.
Current in rivers greatly affect biodiversity. So, plants living in a river must have good adaptations for living in such specific conditions. They must have good and deep root to hold them in place against a river current. Some plants have stems that can easily bend with the river current. Moss, for example, are able to cling to stones.
Less expensive source of energy is available.
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Answer:
The food chain starts with the sun
Explanation: because it provides energy for everything on the planet