Formation of endospore (sporulation) occurs in some organisms such as bacteria. Sporulation occurs during unfavourable environmental conditions. Sporulation is a process to preserve genetic material during unfavourable environmental conditions. The vegetative cell forms a thick-coated, dormant and resistant spore called endospore.
Endospore was discovered by John Tyndall. It is a resting spore and helps bacteria to overcome the unfavourable environmental conditions.
On the return of favourable environmental conditions, the endospore germinates to form new bacteria cell. Since this process does not involve meiosis, the new bacterial cell is genetically identical to the original vegetative cell.
Explanation: If airplane, air pollution. If boat, oil spills. They need to clear trees and stuff for airplanes and boats, so that's habitat loss. So you're answer would be D. All of the above
