Which would be considered an instrument or method of measuring relative time clocks, watches, or stop watches

the length of an alligator

• radiometric dating

tree rings, showing one ring for each year of growth

clocks, watches, or stop watches

Explanation:

Relative time has to deal with how people view time in terms of what a clock or watch measures.

This singular act definition involves the measurement of time with devices such as clocks and watches.

The clocks, watches, or stop watches are validated and is the answer.

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.