Which best defines cohesion?

Cohesion is created by polar water atoms repulsing each other. The drive of fascination that holds particles of a given substance together. It is most grounded in solids, less solid in fluids, and slightest solid in gas. It also holds the bonds together of water.

The inter-molecular attraction which binds the particles together so that they form a unit is called as cohesion. Its basically a force that unites particles. For example, in a water droplet the water molecules are bind together with other molecules and together they from a drop.

Active transport. now that i answered your question i wish you can me

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

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.