Bear: 7/20 tons =7/20= 14/40.
Orangutan: 9 out of 40 tons =9/40.
Hippo: 3/8 ton =3/8= 15/40.
Elephant: 3/5 =3/5=24/40.
After comparison, it is found that the elephant has the largest lift, and then it is compared with the tiger. . .
Elephant: 3/5 =3/5=27/45.
Tiger: 4/9 tons =4/9=20/45.
I found it was the biggest tiger. . .