What is Plasmodium and what does it form?

(N/A) $\rightarrow$ Slime moulds are saprophytic protists.
$\rightarrow$ The body moves along decaying twigs and leaves,engulfing organic material.
$\rightarrow$ Under suitable conditions,they form an aggregation called $Plasmodium$,which may grow and spread over several feet.
$\rightarrow$ During unfavourable conditions,the $Plasmodium$ differentiates and forms fruiting bodies bearing spores at their tips.