Your answer would A insects because insects are the only invertebrates that can maintain flight. FOr example Butterflies and Flies Can maintain flight
Hope this has helped :)<span />
1. DNA strands separate
2. RNA polymerase attached to the gene
3.ribonucletides are assembled
4. mRNA searches from the gene
5. mRNA leaves the nucleus
6. mRNA attaches to ribosome
Its conversion of pyruvate, a process where each molecule loses one carbon atom with the release of carbon dioxide