Answer:first option
Explanation:
If the females only give birth to 1-2 offspring per litter, it would take longer to keep the population alive due to the low ammount of babies being born (you have to concider that some babies don't survive to adulthood though)
The only difference is that animals need the raw resources from another source for respiration, while plants usually have the materials for respiration ready as they have produced them in photosynthesis.
