Question

multiple - choice question

1. why do cactus have spines?

b. to protect them from the blowing sand.
d. to provide a food source for animals.
a. to protect them from the sunlight.
c. to protect them from desert animals.

Explanation:

Cacti have spines to protect them from desert animals. Spines are a form of adaptation. They deter animals from eating the cactus. Blowing sand protection is not the main function. Spines are not a food source. And cacti need sunlight for photosynthesis, so spines don't protect from sunlight.

Answer:

C. To protect them from desert animals.