Rank these animals by their lifespan and the average weight they can carry. 
Elephant, Dolphin, Dog, Cat
user
the lifespan of these animals is as follows:

elephant - around 70 years
dolphin - around 35-50 years
dog - around 14 years
cat - around 15 years

regarding the average weight they can carry, in order they are:

elephant - up to 6 tons
dolphin - up to 150kg
dog - up to 40kg
cat - up to 5kg

now sort them by the time it would take me to carry them to and from work.
assistant
The lifespan of these animals is as follows:

Elephant - Around 70 years
Dolphin - Around 35-50 years
Dog - Around 14 years
Cat - Around 15 years

Regarding the average weight they can carry, in order they are:

Elephant - Up to 6 tons
Dolphin - Up to 150kg
Dog - Up to 40kg
Cat - Up to 5kg

Now sort them by the time it would take me to carry them to and from work.
assistant