Final answer:
Tino's reduction in clothes purchasing due to higher transportation costs is an example of the income effect, where increased prices reduce buying power and alter consumption habits of normal goods.
Step-by-step explanation:
When Tino responds to a sharp increase in his transportation costs by buying fewer clothes, he is demonstrating the income effect.
This economic concept occurs when a rise in prices leads to a decline in the purchasing power of income, causing consumers to buy less of a normal good, despite their actual income not changing.
In Tino's case, the increased transportation costs absorb more of his budget, reducing his ability to purchase clothes at previous quantities, indicating a negative income effect on his consumption of clothes.