Groups based on social identity, such as gender or race, which are organized by employees to focus on concerns of employees from that group, are known as:

Employee affinity groups.

Explanation:

Employee affinity groups, also known as employee resource groups (ERGs),  are meetings in the workplace of workers who share characteristics or backgrounds, to prove support and improving the personal development at work.

Previously focused on underrepresented groups, such as women, and the LGBT community, in the present ERGs are growing into groups assembled around specific activities, like environmental advocacy and community service.

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.