1. C. Osculate is the word that does not mean hostility. Osculate is a term in mathematics.
2. B. Efface is the word that does not mean a second appearance. To efface means to erase.
3. A. Decapitate is the word derived from Latin word for "head". Capita in Latin means head.
Its the past tense for tread. tread- to walk in a specific way
The answer B.Since,Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. ... Diffusion in gases is quick because the particles in a gas move quickly. It happens even faster in hot gases because the particles of gas move faster.
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Apparentley I am answering questions like these ;)
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