The main way in which the <span>federal system helps prevent the centralization power is that it reserves a good deal of power for the individual states--meaning that this power "checks" the power of the central (federal) government. </span>
Western Europe has taken a " leading role in solving global environmental issues
The following conclusion can be supported given the information above;
<span>The French attack on Germany was caused by the military alliance.
The other sentences are not valid conclusions.</span>
i think it is the second one