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Answer :
(a) The method of separating seeds of paddy from its stalks is called \( threshing \) .
(b) When milk cooled after boiling is poured onto a piece of cloth, the cream (malai) is left behind on it. This process of separating cream from milk is an example of \( filtration\) .
(c) Salt is obtained from seawater by the process of \( evaporation\) .
(d) Impurities settled at the bottom when muddy water was kept overnight in a bucket. The clear water was then poured off from the top. The process of separation used in this example is called \( decantation \) .