BlattSalatt

It is not my personal opinion
I was just repeating what I have read in some books
b ) and c) are neither general nor the most efficient behaviours for all situations but it is a matter of fact that some animals use this strategy

Everybody knows that a ants comunity is divided into warriors and workers
The warriors fight for the benefit of comunity not only for themselves

Also some migrant birds do the same
Under attack , just a minority engage the battle
All the others birds keep flying
A migrant bird can not afford to lose energy due to the long trip.
Thanks to the sacrifice of few members the whole comunity can survive

In conclusion "Love" or "spirit or sacrifice " or "generosity" are not unique characteristics of the human kind
It seems amazing but they are also a product of evolutionism