I don't know about specific viruses, but regarding evolution:

Nothing really "wants" to do anything or "knows how to" do anything in this way. It's a simple way of explaining it, that's all.

Before this trait evolved in rabies, let's say, it didn't compel hosts to bite other animals.

Eventually one strain of rabies had a random mutation that made the host more aggressive, or maybe salivate more - something that would cause it to bite or attack.

This particular strain spread really well, because that's a good advantage. This "biting" strain is now the dominant strain - most rabies strains make hosts bite other animals...

So, the virus doesn't want to do anything. It's just the most successful "breed" of virus, so it survived.

A lot of mutations are negative - they usually die out.

This is just an example, not how rabies evolved exactly.

Enjoy the prions

You could never get me to eat brain

We have salt in our bodies and that's necessary as well. So when you're dehydrated you lose both water and salts.

Salt water is too salty and saline is just right.

When you are dehydrated you also lose salts/electrolytes which are not exactly the same as sea water, for example.

The cabbage has a lot of fibre that will pass through you (although this is good for your gut), and water as well that you'll just pee out.

You don't gain the weight of what you eat anyway. You need to process and digest it, which uses energy, and your body uses energy to heat itself, do basic processes, keep your brain running, etc.

Per gram, each macro (fat, carb, protein) has a different calorie value. It's based on how easy it is for your body to break it down and use the components as energy. Calories are just energy.

The macros/foods might have other properties. Protein is also used for muscle building and repair.

Then reviving her after breaking out from the loop? Maybe she's meant to die. But just for a second?

It really depends where you live. Ideally, just go to the bank and ask them your options - you're a customer and they want you to join their bank if it's possible.

The specific bank doesn't matter too much, but they tend to have reputations for being good or bad if you ask family or friends.

Stuff like this is always different. In Czech goats are also tits. In English I suppose it's a bird as well.