The number of organisms in a food pyramid decrease as the trophic level a) decreases. b) increases. c) stays constant. d) changes unpredictably.

B) increases.

Explanation:

A food pyramid is a diagrammatic triangular representation of the food and energy distribution among different organisms belonging to different trophic levels. The flow of energy is unidirectional this because of the fact that organisms of the lower trophic levels are consumed by organisms of higher trophic levels. The number of organisms at the lower trophic levels are expected to be more so that they can meet the food and energy needs of organisms of higher trophic levels.

Hence, The number of organisms in a food pyramid decrease as the trophic level increases.

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 .. .