attract (v) - cause (someone) to have a liking for or interest in something, constant (adj) - happening all the time or repeatedly, efficiency (n) - doing something well with no waste of time or money, frequently (adv) - often, instruction (n) - detailed information on how to do or use something, necessarily (adv) - used to say that something cannot be avoided, population (n) - all the people who live in a particular area, city or country, recommendation (n) - an official suggestion about the best thing to do, stress (n) - mental pressure, zone (n) - an area or a region with a particular feature or use,

Module E lesson 21

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