Answer:c) Radomized clinical trials
Explanation:Randomied clinical trial is a study used in scientific experiments in which the participants are divided randomly into group that compare different treatments or interventions.
Here participants are chosen by chance to receive clinical interventions.
I believe it’s Precambrian.
<span>D. Multiple cropping</span>
Answer:
Biosphere is affected directly by the change in the hydrosphere in a natural way for example: the rain that falls from cloud and again the cloud forms by the evaporation of water from the ocean.
Explanation:
- Rain (hydrosphere) falls into the atmosphere from clouds forming the river water and streams in the biosphere.
- Plants and animals are dependent over this rain water for their survival in the form of drinking water for their growth.
- Water then evaporates from the rivers and oceans forming clouds when water vapor condenses.
- In this way living organism are highly affected by the natural process occurred in the hydrosphere.
