What are the regions in the environment that provide basic needs

answer: biosphere and hydrosphere

biosphere is a region on earth where living organisms grow, reproduce and complete their life span. the biosphere provides resources to living beings necessary for their survival such as food, shelter and others. hydrosphere is a region on earth which is a source of water. water is a necessary abiotic factor required by all living organisms. it is a home of many aquatic organisms.

typically, most spiders possess eight eyes. however, others have as many as 12, and some don't have any. these eyes are for detecting light from dark, deciphering shapes and for gathering their prey.

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.