Many people hang up on telemarketers, but others will listen politely to their pitches even if they are not interested in the product. telemarketers know that anyone who agrees to listen to a pitch is more likely to buy the product, to the phenomenon.

risky shift

polarization

norm-of-reciprocity

foot-in-the-door

door-in-the-face

foot - in - the - door phenomenon

Explanation:

Foot - in - the - door phenomenon-

It is the method , by which people tends to stick to some act just by first agreeing to a small request, is known as the method of foot - in - the - door phenomenon.

A small initiative is taken firstly in order to get the people for long run, i.e. as shown in the question, people tends to get their eyes on television, even though are might or might not be willing to buy the specific product .

Hence, this method is adapted in order to increases their marketing strategy .

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because he had a big bear belly