The ratio of air is water vapor content to its capacity to hold water vapor at that same temperature is the

Relative humidity

Explanation:

Relative humidity is the amount of water vapor present in air at a given temperature. Relative humidity depends on the temperature and pressure of the surrounding. The relative humidity is the ratio of the amount of water vapor in the air at a given temperature to the maximum amount of water vapor the air can hold at that given temperature, it is usually expressed in percentage.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

answer: a

explanation:  

stocks and bonds are the two main classes of assets investors use in their portfolios. stocks offer an ownership stake in a company, while bonds are akin to loans made to a company (a corporate bond) or other organization (like the u.s. treasury). in general, stocks are considered riskier and more volatile than bonds.

savings accounts are just money in a bank- they are insured by the fdic for up to 250,000.   very little risk

the average mutual fund holds hundreds of different securities, which means mutual fund shareholders gain important diversification at a low price. which means if one stock or bond drops it will have very little affect on the mutual fund - again very little risk