Why should you include weight training as part of your exercise routine? 1. To increase muscle mass 2. To increase bone density 3. To increase flexibility - A. Only 1 B. Only 2 C. 1 and 2 D. 1, 2, and 3. No links pls answer correctly and only if you know the answer. I think it’s d tho will give brainliest if right

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents