What conclusion did the researchers from university of california san diego reach regarding the best type of material to use for beach nourishment?

sandy areas of a beach should alternate with cement areas to prevent erosion.

large, coarse grains of sand should be used since they remain on the beach longer.

boulders should be placed near the water's edge to prevent the current from taking the new sand out to the ocean.

sand mixed with soil should be used to promote plant growth and prevent erosion.

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.

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: