Answer:
The function of decomposers in a food web is to recycle nutrients into soil.
Explanation:
A is correct because the decomposers are able to digest the dead biomass, release nutrients from them in the soil, thus recycle the nutrients, and enrich the soil.
B is not correct because this is a function performed by the producers.
C is not correct because this is also a function that is performed by the producers, or by the primary consumers.
D is not correct because the decomposers do not compete for oxygen with the secondary consumers.
They use maps and satellites.
Located almost due east of the Reflecting Pool and the Lincoln Memorial, the monument, made of marble, granite, and bluestone gneiss, is both the world's tallest stone structure and the world's tallest obelisk, standing 554 feet 7 11⁄32 inches (169.046 m) tall according to the National Geodetic Survey
My Answer: London
Why?: It is the first capital city bisected by the Prime Meridian.
Hope I helped! :D