Which of the following is associated with the arrival of el nino?
a_increase in surface pressure over australia
b_decrease in surface pressure over the indian ocean
c_decrease in surface pressure over indonesia
d_increase in surface pressure over the eastern pacific
e_increase in strength of trade winds in the south pacific

Increase in surface pressure over Australia

Increase in surface pressure over the eastern Pacific

Decrease in surface pressure over Indonesia

Australia, Indonesia, Philippines suffer droughts;

The first signs of an El Nino are an unusual warming of the water in the tropical Pacific Ocean,
In turn, this results in increases in rising warm air, changes in the air pressure patterns and shifts in the high-level winds that direct the movement of weather.

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.