Why is dna replication describe as semiconservative

Semiconservative DNA replication is a mechanism of DNA replication which results in two copies of DNA, each consisting of one parental DNA strand and one newly synthesized. Each strand of DNA helix serves as a template for new strands. The new strand remains associated with template strand.
Oppositely, in conservative DNA replication, each strand of DNA helix serves as a template for new strands, but new strands separate from template strands and associate into new DNA, so one DNA copy has both original strands, and another one has both new strands.

Tropical

Explanation:

"The equator runs through the middle of Africa, as do the Tropic of Cancer and the Tropic of Capricorn, making Africa the most tropical continent. The already hot and dry climate that straddles the equator, makes it the most vulnerable continent to climate change."