25) In a certain area where there are many farms, the groundwater levels have dropped by as much as 10 m over a period of 30 years. The main cause behind this is MOST LIKELY A) the evaporation of water from aquifers.

B) the excessive pumping of water through wells.

C) the leakage of fertilizers from the farms into the aquifer.

D) the construction of a dam to divert water into a reservoir.
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I will give Brainliest to 1st right answer!

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answer: i dont know the answer but this might

explanation:

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it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.