How does afforestation help to control flood and landslide.​

Afforestation. Trees are planted near to the river. This means greater interception of rainwater and lower river discharge . This is a relatively low cost option, which enhances the environmental quality of the drainage basin .

Trees prevent floods, landslides

They help the groundwater supply recharge, prevent the transport of chemicals into streams and prevent flooding. ... The trees' roots suck water deep from under the ground to as low as 200 feet. They hold the soil together so that erosion is prevented.

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where's the following? you gotta add it to know what the choices are

explanation:

hypothesising or postulating