Protectionist policies are driven by economic factors. I think a trade bloc (eg. EU in particular) can be argued as being Protectionist but the text book won't say that.
An embargo is driven by Politics. I don't think it will be accepted.
An embargo is just banning a country from importing their good into australia. Australia may be boycotting them for some reason, maybe because countries such as America are led by dickheads. We should place an embargo on america