I planted a cactus on my balcony, which is my favorite plant. I usually keep it as a treasure and remind my mother to water it every day.

At first, my cactus was small, with thin thorns but still sharp. After a month, it finally stretched out a pair of small hands, and its thorns grew longer and denser. Because I see cactus growing well, I often water it once every three to five times. Although I don't water it often, it still stands proudly. A few months later, the cactus grew a pair of small ears and grew a lot taller. I am very happy!

Then July came, and we had our summer vacation! So, my mother decided to take me to Xiamen to visit my grandfather. I heard that Sisi Lee will also visit Xiamen from Fuzhou. We have been playing in Xiamen for several weeks, and we have long forgotten the cactus. I didn't remember there was a cactus at home until I came back. As soon as I got home, I ran to the balcony. I was surprised at the scene. The cactus not only did not wither, but also miraculously grew up.

However, why can cactus thrive in such a hot sun without dying? I looked up the encyclopedia with questions, and when I saw it, I suddenly realized. It turns out that the thorn of cactus is its leaf. Cactus originally grew in the desert. Due to the dry and hot climate in the desert, in order to reduce the evaporation of water, cactus leaves gradually degenerate into sharp thorns.

Cactus is really tenacious. Even if it is not watered, it will not wither and thrive. This spirit is worth learning.