سوال ۱۳ کنکور ارشد مدیریت کسب‌وکار (MBA) ۱۴۰۲

Choose the marked part that must be changed for the sentence to be correct. The four marked parts are listed as the options.

This material gradually coalesced into lumps (1) called planetesimals as gravity and chance smashed smaller pieces together, (2) was a chaotic and violent process that became more (3) so as planetesimals grew in size and (4) gravitational pull.