A student drew the following flowchart to show the movement of nutrients.
Factory → Air → Plants → Animals
Which process is the arrow between the factory and the air likely to
represent?
A. Fixing nitrogen
B. Burning fossil fuels
C. Growing plants for food
D. Carrying out photosynthesis

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.

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.

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the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.