If fossil species A is consistently recovered from geological deposits beneath layers containing species B, then species A is considered to be older than B. This defines a relative dating technique based on the principle of:

The question is incomplete as it does not have the option which are

- superposition

- paleomagnetism

- fluorine analysis

- geolayering

Superposition

Explanation:

In calculating the relative age of the fossils, the paleontologists use the principle or law of superposition.

The law of superposition states that the rock has layers in which one layer is deposited over another layer. Each layer of these layers is older than the layer which is present at the top of this layer.

Therefore, this method can be used to determine the relative age of the fossils like in the given case, the species A found in the lower layer than the species B because the species B is present in the top layer.

Thus, the superposition is correct.

Superposition

Explanation:

The principle of superposition suggests that the strata or layer of rock or sediment can be compared by assessing the fact that the younger layer remains at the top whereas the older at the bottom. This is indicative of weathering process, the sediments removed earlier deposit at the bottom and which released later on deposit at the top.

According to the given situation, species A is found beneath B the age of these fossils can be compared with the principle of superposition of the strata. A is found beneath the older layers of sediments and B can be recovered from the young or superficial sediments.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.