If you are given the chance to be part of an authority, how will you address disorders in the society like terrorism?

Keep a look out for suspicious situations, such as an unattended luggage or someone with a visibly high degree of interest in a building's security, to assist lower the risk of a terrorist strike.

In public places, be cautious.

In places where there are a lot of people, such as metro and railway stations, festivals and performance sites, and retail malls, be especially cautious.

In every building you visit, double-check the placement of the emergency exits.

Don't forget to keep an eye on your valuables.

The context plays a big role in determining whether or not a scenario appears suspicious. An abandoned luggage on a train platform, for example, does not always indicate something terrible. Still, the best course of action is to immediately alert a member of staff. Alternatively, you can contact the authorities.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.