The league [does] very well when sparrows shout, but no good at all when eagles fall out." benito mussolini, 1937 mussolini meant that the league of nations a) should not have asked panama to be a member. b) lacked diplomats that could settle arguments. c) had little power because it lacked military backing. d) needed germany and russia because of their alliances.

The best option is Chad little power because it lacked military backing
More specifically he meant that the league of nation was very effective in settling minor disputes among minor nations, but was ineffective in wading off conflict among major powers. the sparrows were minor nations such as Greece which Italy had invaded  and Yugoslavia,while the eagles were countries like Britain and Italy who could act with impunity and could not be affected by the league sanctions.

The one that most represents the earths mantle would be the skin since the mantle is the upper part of the earths depths which is just like the skin of an apple.