What are three positive effects of diverting or stopping the flow of river water?

You can Chanel it around a town so there is no flooding

If some place needs water then you can divert the water to the specific place

Also stopping it and creating a dam can offer the positive results of inexpensive energy, increased recreation opportunity and flood control

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass