Which description best fits the role of macrophages? O Macrophages engulf pathogens.
O Macrophages make memory cells.
O Macrophages trigger allergies.
O Macrophages make T cells.

The first option

Explanation:

Macrophages will try to prevent the spread and kill off the pathogen by fully engulfing them. Essentially the macrophage will try to eat them in order to stope them from doing more harm.

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relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

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answer: 45

explanationyou have to add as well to be it could be