Use the graph to answer the question.
The vertical axis ranges from 0 to 100 in increments of 10. The horizontal axis lists dates from 1776 to 2018. The data is as follows. 1776: Wood, 100%. 1801: Wood, 100%. 1826: Wood, 100%. 1851: Wood, 90%. Coal, 10%. 1876: Wood, 65%. Coal, 34%. Petroleum, 1%. 1901: Wood, 20%. Coal, 61%. Petroleum, 3%. Natural gas, 3%. Hydroelectric, 3%. 1926: Wood, 5%. Coal, 65%. Petroleum, 20%. Natural gas, 7%. Hydroelectric, 3%. 1951: Wood, 2%. Coal, 38%. Petroleum, 40%. Natural gas, 16%. Hydroelectric, 4%. 1976: Wood, 20%. Petroleum, 45%. Natural gas, 29%. Nuclear, 2%. Hydroelectric, 4%. 2001: Coal, 25%. Petroleum, 35%. Natural gas, 20%. Nuclear, 18%. Hydroelectric, 1%. Other renewable, 1%. 2018: Coal, 15%. Petroleum, 35%. Natural gas, 30%. Nuclear, 12%. Hydroelectric, 1%. Other renewable, 7%. The values used in the description are approximate.
Which renewable resource has been used for the longest time?
(1 point)
Responses
hydroelectric power
hydroelectric power
natural gas
natural gas
nuclear
nuclear
other renewable resources
other renewable resources
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