Explanation:

The correct answer is option 'C' - Plant.

Reason:

- An elephant can defend itself from a cow because elephants are much larger and stronger than cows. They have long trunks that they can use to push or hit the cow, and their size alone can intimidate the cow.

- A tiger can also defend itself from a cow because tigers are powerful predators. They have sharp claws and strong jaws that they can use to attack the cow and defend themselves.

- On the other hand, a giraffe cannot defend itself from a cow. Giraffes have long necks and are known for their height, but they are not equipped to defend themselves against other animals. They do not have any physical weapons like sharp teeth or claws. Giraffes are herbivorous animals and their main defense mechanism is to use their long legs to kick at predators. However, against a cow, which is also an herbivore, this defense mechanism is not effective.

- Finally, a plant is not a living creature and cannot defend itself from any other animal, including a cow. Plants do not have any means of mobility or defense mechanisms. They rely on other means to protect themselves, such as thorns, toxins, or attracting other animals to fight off potential threats. However, these mechanisms are not applicable in the case of defending against a cow.

In conclusion, among the options given, the only one that cannot defend itself from a cow is a plant as it is not a living creature and lacks the necessary means of defense.

Plant