Answer:
B, A cactus stores water during wet periods, allowing it to live through dry periods.
Explanation:
Hiya! So, the reason it's B is because homeostasis is an cell/organism's ability to maintain constant bodily equilibrium, allowing it to survive during the cold and heat.
For example, we humans are able to maintain a healthy body temperature of 98.6°F/30°C, which can automatically adjust to better fit the climate we're in.
Hope this was helpful ^^