6. Complete the sentences using some of the superlatives in the puzzle.

a. Cheetahs can reach speeds between 112 km and 120 km per hour. This makes them the fastest land animals.

b. The anaconda is the largest snake in the wild.

c. A male elephant can weigh about 6,000 kg, that's why it is considered the heaviest land animal.

d. The black widow spider has an extremely potent venom; it is the most dangerous spider.

e. The most aggressive animal is the hippo because it often attacks humans in boats.