Answer:

BENIFICAL-In all these environments, organisms interact and use available resources, such as food, space, light, heat, water, air, and shelter. Each population of organisms, and the individuals within it, interact in specific ways that are limited by and can benefit from other organisms

HARMFUL-Interspecific competition, another negative interaction form symbiosis, describes a type of interaction where organisms of the same species or different species use the same limited resources in a community. Examples of limited resources can be food, a space to live, or even sunlight.

Answer:

Benefits:

Protector as normal flora live on your skin and gut

Normal flora acts as fighter to constituent or other type of bacteria from colonizing your skin

Normal flora helps to digest food in your intestines

Normal flora release enzyme that harmeless to human but harmful to other types colony

Harms:

If they're large in number, they might attack you

If you dont take a good care of yourself, it would gives you damages. Eg: smoking for Helicobacter pylori l lives