"To choose an asset" means to make a decision or selection regarding a valuable item or investment that has potential value or can generate income. Full definition
One being the idea of choosing an asset allocation strategy for the next several decades without being able to predict the future. (novelinvestor.com)
Modern portfolio theory says that portfolio variance can be reduced by choosing asset classes with a low or negative correlation, such as stocks and bonds. (investopedia.com)
Once you've chosen your asset mix, you'll select specific investments. (investor.vanguard.com)