Corn is a pretty good example of this. The stuff bends over backwards to adapt to human needs. Such a wonderful plant. It's fuel! It's bread! It's sugar! It's cooking oil! It's a hundred other things! It grows at absurd densities!
Yeah but we cultivate corn, it's like bees spreading pollen. The key is superior relative reproduction rate. But it's obvious and I'm bored of people being braindead. And corn is an easy example since it's a primary consumer (sunlight). It gets more 'tricky' for secondary, tiertary and so on consumers (herbivors, predators balblabla). But it's always the same idea.
Limited energy, adaptation allowing one subgroup to over time get more energy by extracting it more efficiently, reproducing more efficiently, surviving longer in some species.
If some specie is not 'tasty' btw, the predators consume less, get less energy, the predated population grow, then some predator who find them tasty emerge, and replace the former predator etc.
In the case of corn, we find some corn tasty, and allow it to spread and reproduce. The point is not the survival of the individual but the survival and transmission of the genome, which is in every seed making plant, spread by predators in their fieces, wings etc.
Such principles can be found in human cultures with what we call empathy, by puting the survival\welfare of the group\other individuals before our own we make it more likely for the species genome as a whole to be transmitted.
You also have vampire bats falling in that social sacrifice category, they'd share blood with the individuals that didn't get lucky hunting, and those individuals would give blood when they hunt.
How did it evolve? Well the bats that shared excess food had some genes defining the behavior, those individuals had a better reproductive rate compared to 'selfish bats' as a group.
So the empathic bats replaced the selfish bats over time. (I say bats but for all I know it could have happened before bats were actually 'bats', titles aren't important, genes are ).
How would you feel about explaining people how to open a door?
Well, that's my life. ANd that's why i prefer to talk shit most of the time. Saves me a few headaches.
You have to understand a problem from everyside instead of focusing on one limited aspect and calling it knowledge.