What type of rock forms when heat and pressure change other rocks without occurring a metamorphic b sedimentary c igneous

At a continent-continent convergence,

Which two nations are doing the most to combat their environmental issues?

Tides are caused by a differences in the gravitational force of the sun at different points on earth. differences in the gravitational force of the moon at different points on earth differences in earth’s gravitational field strength at different points on earth’s surfac fluctuations in the gravitational attraction between earth and the moon.