Question

read the text.
since 2013, the population of sea stars along north americas pacific coast has been dramatically reduced. microbiologist ian hewson believes a type of virus known as sea star association densovirus (ssadv) is responsible. due to the disease, sea stars eventually decompose into a white sludge. surprisingly, though, hundreds of sea star babies appeared in the spring of 2016 along the oregon coast. researchers think that the massive reduction in adult sea stars has contributed to the baby boom. fewer hungry adult sea stars means more food for hungry babies. in turn, more food has led to a greater survival rate for the youngsters.
match causes with their effects.
more sea star babies are surviving. sea stars are disintegrating into white goo.
cause effect
sea stars are getting ssadv.
more food is available.

Explanation:

The text states that SSaDV causes sea stars to decompose into white sludge, so "Sea stars are getting SSaDV" is the cause for "Sea stars are disintegrating into white goo". It also notes more food for babies leads to higher survival, so "More food is available" is the cause for "More sea star babies are surviving".

Answer:

Cause: Sea stars are getting SSaDV → Effect: Sea stars are disintegrating into white goo
Cause: More food is available → Effect: More sea star babies are surviving