Question

1. tidal power is harnessed by

bombarding uranium nuclei with neutrons
building a dam across the mouth of a bay
lapping into underground steam reservoirs
building a dam across a swiftly flowing river

Explanation:

• "Bombarding uranium nuclei with neutrons" is nuclear fission (nuclear power), not tidal.
• "Building a dam across the mouth of a bay" is how tidal power is harnessed (tidal barrages use bays to capture tidal flow).
• "Tapping into underground steam reservoirs" is geothermal energy.
• "Building a dam across a swiftly flowing river" is hydroelectric (from river flow, not tides).

Answer:

B. building a dam across the mouth of a bay