It has often been said that the next dominant animals on land, after a hypothetical demise of all mammals, would be the insects. Why so?

Explanation:

The animals that dominate the Earth today are the human species or Homo sapiens. Many factors have allowed the species to dominate the Earth-like use of new tools, vocal cords, and an increased sense of intellect and natural intelligence. But today we can observe the social wars, epidemic, and harm to our planet which could result in the extinction of humans.  

The scientist has hypothesized that after the Homo sapiens, new dominating species will be insects as this group of the organism has:

1. Survived many mass extinctions.

2. are highly adaptable to extreme conditions.

3. Has evolved many adaptive features to protect itself from prey like a tough exoskeleton, few to many legs, bombarding in few species when someone tries to eat it, and many others.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms

the answer

b.) bowling ball