Answer: The correct answer is option(B)
Step-by-step explanation:
UAS means that unmanned aircraft system. This aircraft is generally a remote controlled aircraft controlled by the pilot sitting in the ground control station. They are actually used to get the excesses into those places where physical excess is not possible or difficult. Some times used for spying by authorities to keep a check on any mishap. Similarly is is also used to photograph and report the poaching activities taking place in the forests.
GPS means Global positioning system which used to calculate accurate and precise position, speed , location and time information to a GPS receiver.
GIS means that geographic information system. system desined to store geographical data.
eDNA surveillance is technique used by the experts to detect the presence of aquatic species by collecting the DNA samples from environmental samples.
Hence, the correct answer is option(B)