What are the keywords in the following sentence? wind is now the cheapest source of clean energy
energy, source, wind

What are the keywords in the following sentence? new leaf is grown in tree
grow, leaf, tree

What are the keywords in the following sentence? i loved to arrange my food in this order .
arrange, food, love

What are the keywords in the following sentence? A tower with a clock and turret on top of a building.
top, tower, turret