This is the ability for humans to modify their environment a- hearth
b- possibilism
c- polder
d- environmental determination

The valve seat performs two functions: it provides a seal for the valve in the combustion chamber, and it provides a cool surface to carry heat away from the valve. most valves use a seating angle.

Who wants brainliest and free answer this question correctly and i got you. if you're found to be at fault in you'll be required to attend a traffic collision avoidance course. a. one crash in the first year after getting your license b. a collision involving a police officer c. two crashes in two years d. three crashes in three years

Motorcyclists may have to suddenly change direction when encountering a. potholes and reflective markers b. yellow lights c. pavement seams and railroad crossings d. strong winds