30)
experts estimate that over 25,000 species become extinct each year, with some estimating this number to be over 100,000. this is an alarming rate that threatens fragile ecosystems and global biodiversity. which of these is currently the leading cause of extinctions today?
a) global climate change
b) habitat loss due to human interactions
c) development of cleaner running automobiles
d) natural disasters such as volcanic eruptions and earthquakes

im not exactly sure but i think its b!

d

explanation:

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.