Climate change has brought about a range of environmental challenges, worsened by human activities. Firstly, the increasing temperatures have led to more frequent and severe extreme weather events such as hurricanes, wildfires, and droughts. (18) _______but also have long-term consequences for economies and societies.

Secondly, changes in precipitation patterns have resulted in alterations in rainfall distribution, intensifying floods in some areas (19) _______.These changes in water availability have negative effects on agriculture and (20) _________.

Additionally, the melting of polar ice caps and glaciers has contributed to rising sea levels, which is a threat (21)________.

Furthermore, (22)__________, endangering marine biodiversity and fisheries.

In conclusion, the connection between these climate changes emphasizes the urgent need for global collaboration and coordinated efforts. It's crucial for people worldwide (23)__________ the impacts of climate change and strengthen vulnerable communities.

(Adapted from baidu.com)

Mark the letter A, B, C, or D to indicate the correct option that best fits each of the numbered blanks from 18 to 23.