Abird conservation has a database of every bird spotted by members in the past year. to make this data a part of a gis would require tying each sighting to:
a. membership numbers
b. species scientific names
c. the name of the person who made the sighting
d. a location on a digital map

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Answer erosion,oil spills,pollution,tourism,urban development;

Answerhurricanes;

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion