Answer: D) Carbondioxide Explanation: 72% of the totally emitted greenhouse gases is carbon dioxide.   Hence, Carbon dioxide (Co2) is predominantly responsible for Global warming.

Answer: B) Pulmonary abscess Explanation: Pulmonary abscess is a type of liquefactive necrosis of the lung tissue.    Hence, Localized area of pus formation in the lungs is Pulmonary abscess.

Answer: A) nonpolar, with a symmetrical distribution of charge Explanation: CF4 is tetrahedral. Since the four 'F' atoms have the same electronegativity values, there is no bias in electron distribution toward any one.   Therefore, electron/charge distribution is symmetrical, which also means that the molecule is nonpolar.   Hence, CF4 is nonpolar molecule with a symmetrical distribution of charge.

Answer: B) 3.5% Explanation: Seawater or salt water is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of approximately 3.5% or 35 parts per thousand. This means that for every 1 litre (1000 mL) of seawater there are 35 grams of salts dissolved in it.   Hence, The average salinity of seawater is 3.5%.

Answer: A) discourage producers from taking harmful actions. Explanation: Government regulation protects constitutional rights, safety, and fairness.   Hence, Government regulation is intended to discourage producers from taking harmful actions.

Answer: D) a Explanation: a -  at the peak of changes in blood pressure indicates the systiolic pressure.

Answer: C) Hold on to political and economic power. Explanation:

We know that 1 yard = 3 feet.    A yardstick which is used for measurement has 3 feet long but it cannot walk.