Definition of Altruism ;
is the belief that the well-being of others is equally, if not more, important than the well-being or survival of the self. Further, altruism involves selfless acts or undertakings that put the welfare of others before one's own.
An example of altruism in a sentence would be , Politicians are not necessarily motivated by pure altruism.
It's "computers", because they're the subject of the verb to be.
I think.
The second one! “After sofie had finished her work, she went to lunch.”
