PLEASE ANSWER ASAP FOR BRAINBLEST A small shaped gland that produces progenitor cells, which mature into T-cells help other organs in the immune system grow properly *
A. immune system
B. Thymus
C. Bone marrow
D. B and T cells
E. Secondary lymphatic tissues

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.

hope this .. .

answer; ///(statins)/aka as hmg coa

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the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.