Read the following text and fill in each gap with a suitable word based on the  information of the text.

Fish population is in serious danger from global warming, Climate change is increasing the water temperature in rivers, lakes and seas. This means there is less food and oxygen available for fish. It also means the fish may not grow fully and may have fewer offsprings, Some fishes will become extinct if temperatures rise even by one or two degrees Celsius. Climate change increases the pressure on fish population valuable biological assets. Forty percent of people in the world eat fish as their main source of protein. If we fail to reduce greenhouse gas emissions, we will increase the pressure on fish. As a Fishes are one of the world's most result, people who depend on fish will suffer from hunger and poverty.

  It is (a) ---- from the passage that global warming is (b) ---- great threat for fish population.(c) ----- global warming, food production and oxygen (d) ----in water decreases. As a result, some fish may be extinct (e) ----.