The Harappan culture, which flourished in the Indus Valley during the Bronze Age, is known for its intricate terracotta art and seals. These artifacts often depict a variety of animals which held significant cultural or religious importance for the Harappan people.

Option 1, Cow, is the correct answer because, despite cows being common domestic animals, they did not appear on any known Harappan seals or terracotta art.

Option 2, Elephant, is incorrect because there are numerous examples of seals depicting elephants.

Option 3, Rhinoceros, is also inaccurate because these creatures, though not native to the region, are depicted on some Harappan seals, possibly symbolizing trade or cultural exchange with regions where rhinos lived.

Option 4, Tiger, is incorrect as well, because various examples of seals and art bearing the representation of tigers have been found within Harappan sites.