Ship.

Reason : Ship is manmade. All other things are naturally found in oceans.

Dead Sea.

Reason : Dead Sea is comparatively smaller. All other give larger.

Peru.

Reason : Peru is to the south of the equator. All other given nations are to the north of the equator.

Bay of Bengal.

Reason : Bay of Bengal is a bay. All others are oceans.

Natural Gas.

Reason : Natural gas is a gas. All others are minerals.

Man gets the following items from the oceans:

• Minerals like iron, lead, cobalt, sodium, manganese, chromium, zinc, etc.
• Precious items like pearls and corals and ornamental items like shells.
• Mineral oil and natural gas.
• Food items like prawns, clams, crabs, seerfish, mackerel, pomfret, Indian shark, Indian salmon, etc. and medical plants.

• By waterways, bulky materials like coal, crude oil, raw materials, metallic materials, food grains, etc. can be transported with ease.
• Water transport carried out along ocean currents, accelerates the speed of ships and also saves fuel to a considerable extent. Therefore, it is economic to carry out transport by waterways.

• In the regions close to the oceans, because of the heating of sea water, water vapour gets mixed in the air.
• This water vapour holds the heat in the air and the air remains humid.
• Humid air leads to less amount of difference in the day and night temperature [range of temperature). Therefore, regions close to the oceans have an equal climate.
• In the regions far away from the oceans, the amount of water vapour is extremely less. As its effect, the air remains dry.
• Dry air leads to a sharp difference in the day and night temperature (range of temperature). Therefore, regions far away from the oceans have an extreme climate. In this way, there is a difference in the climates of regions close to the oceans and regions far away from the oceans.

The continents of North America, South America, Asia and Australia are located along the coast of the Pacific Ocean.