The first is an armed head, summoned to warn Macbeth that Macduff is coming back to Scotland to ruin him. The second apparition is a bloody child and it tells Macbeth that no man born of a woman can do him harm. This gives Macbeth great confidence: "Then live Macduff: what need I fear of thee?" (4.1.78-80). The third apparition is that of a child wearing a crown and holding a tree. It declares:
Macbeth shall never vanquish'd be until
Great Birnam wood to high Dunsinane hill
<span>Shall come against him (4.1.87-90). </span>
<span>Macbeth is sure that the third apparition's prophecy will never be, for 'who can impress the forest?' or 'bid the tree unfix his earth-bound roots?' (4.1.91-3). </span>
<span>Cold is to freeze as heat is to melt</span>
<span>cold is opposite of heat </span>
<span>freeze is opposite of melt</span>
Hope this helps. :)