Roman says that the risk of osteoporosis can be reduced by making a certain lifestyle choices. which lifestyle choice could roman be referring to

Certain lifestyle changes like increasing the intake of Vitamin D and calcium could lower the risk of osteoporosis.

Explanation:

On the basis of what Roman narrates regarding the threat of osteoporosis, a certain lifestyle choice that would minimize the threat of the condition would be increasing the consumption of calcium and calcium-rich components, and enhancing the uptake of Vitamin D for the absorption of calcium.  

In order to cure the conditions like osteoporosis, the consumption of calcium is possibly one of the prime things that one should do.  

protist eukaryotes that are not plants, animals, or fungi ("misfits")

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: