Trees give off oxygen that we need to breathe. Trees reduce the amount of storm water runoff, which reduces erosion and pollution in our waterways and may reduce the effects of flooding. Many species of wildlife depend on trees for habitat. Trees provide food, protection, and homes for many birds and mammals.
That would be the textile industry
Crocodiles are more closely related to amphibians. Ray-finned fish evolved before sharks.
The answer would be “the igbo women’s war”.