In the 1930s, advertisers for the DeBeers diamond company invented the slogan, A diamond is forever,” singlehandedly revolutionizing the industry by implying that the only appropriate
engagement gift was a diamond ring. To this day the tradition stands. Which of these criteria
for a good ad campaign did this slogan meet? (Select all that apply.)
It created a demand where there has previously been none.
It included a call to action.
It reached its target audience of young men.
It created an affinity between the consumer and the product.

answer: when the substance contain the two parts (polar and non-polar) like soap.

explanation:

soap is produced from the basic hydrolysis of ester "saponification", it is considered as a salt of hydrocarbons. the soap molecule contains the two parts: a polar group   (-coo-na+) and a non-polar group (r-hydrocarbon part). the polar group is called the head and the tail is the non-polar group. the polar group is hydrophilic in nature (water loving) and the non-polar group is hydrophobic in nature (water repelling).the polar/non-polar nature of a substance is useful that it can dissolve the non-polar substances by the polar part and also can dissolve the polar substances by the non-polar part. it commonly used in detergents and soaps.