Dna, the genetic material of living organisms, is damaged by light in the

... in the UVB light exposure.

Explanation: When DNA is exposed to UVB radiation, thymine bases that are close to each other in the genetic sequence bond together, and this bond cannot be copied by the enzimes responsible for reproducing the genetic material. In the skin, it causes sunburns and stimulates the production of melanin. Luckily, DNA is only damaged by 0,1% of those UVB radiation photons, but even this percentege is enough to cause a sunburn anyway.

rising sea temps which are causing coral reefs to bleach and die out

glaciers are melting causing sea levels to rise wgich could flood out land

explanation:

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.