Ocean-ocean convergence produces a. mainly continental volcanic arcsb. parallel belts of folded mountainsc. mainly volcanic mountainsd. parallel belts of uplifted and volcanic mountains

C. Mainly volcanic mountains

Ocean-ocean convergence is a process that takes place in deeper oceanic plates, which are lying deeper in the oceans. When these plates converges it results in subduction which means deposition of materials when the edges of the two plates convergence the sediments are deposited beneath the ocean. These heavy sediments affects the magma and generates energy sufficient to  cause volcanic eruptions. The volcanic eruptions results in the formation of mountains as above the magma there are many layers of sediments which develop into mountain.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.