In what two plate tectonic settings do most volcanoes occur?

at divergent plate boundaries (ocean ridges or rifts) and at convergent plate boundaries at subduction zones

at convergent plate boundaries at subduction zones and on lowland plains

at divergent plate boundaries (ocean ridges or rifts) and within tectonic plates themselves

answer by yourhope:

hi! : )

in which structure in the nucleus are ribosomes made?

b) nucleolus!

: )

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.