Option 1 states that warm-blooded animals can remain active in a cold environment, while cold-blooded animals struggle to move. This statement is correct. Warm-blooded animals, such as mammals and birds, have the ability to regulate their body temperature internally. This allows them to generate heat and maintain a stable body temperature even in cold environments. On the other hand, cold-blooded animals, such as reptiles and amphibians, rely on external heat sources to regulate their body temperature. They become sluggish in cold environments as their metabolic processes slow down.

Option 2 states that cold-blooded animals require less energy to survive than warm-blooded animals. This statement is also correct. Cold-blooded animals have a lower metabolic rate and generally require less energy to survive. This is because their body temperature is dependent on external conditions, so they do not need to expend energy to maintain a stable internal temperature like warm-blooded animals do.

Therefore, option 3 is correct as both statements 1 and 2 are true. Warm-blooded animals can remain active in cold environments while cold-blooded animals require less energy to survive.